The bold is where the issue is. IF the bolt locks to the rear and the bolt catch is pressed it will charge the rifle. The charge handle will charge the rifle regardless of whether or not the bolt is locked to the rear.
Again, that is why I always, always teach people to LOOK at the chamber. Even if you can feel the bolt lock back through armour and heavy clothing, it STILL feels just like a double feed. The fact is, you pull trigger, you DON'T KNOW what the exact issue is unless you OBSERVE the stoppage.
You can also tell if the bolt is locked back by observing the bolt release. If it's flat, bolt is not locked back. Pretty simple. I've also had people put a dab of paint behind it for easy ID of a bolt lock. The charging handle will not always charge the rifle. If you double feed, it won't do s**t. If the round goes above the BCG, it won't do s**t. Again, blindly running the charging handle is not a solution. I'm not saying it is BAD to use the CH, I am saying there are advantages and disadvantages to each, and the advantages you advertise are not entirely true.
You also can't short stroke the bolt release. Once triggered, it's gone.
Executing an immediate action of TAP TUG RACK could lead to a type three stoppage, the double feed, or a type one, failure to feed(due to short stroking) that's it. There is no "slew" of other problems it can induce. That being said, the bolt cycling under normal operation can cause the same stoppages, so its not limited to manual cycling of the charge handle. As was mentioned above, observing the chamber does not work on all rifles or in the dark, making it ineffective.
Not observing the chamber is 0% effective, all the time. Observing the chamber is 80% effective, if you do 20% of your shooting in the dark, which I doubt most do, and if you do, why don't you have NVDs? Blindly running the charging handle is not the be all end all solution.
Again the bold section. The human error factor is present regardless of which method is being employed. If both sides of the equation have the same factors they can be eliminated for the purpose of discussion.
No, you can't just eliminate it. The motions are entirely different, and you cannot apply a binary response to the charging handle like you can on a bolt release. When you push the bolt release, TWO things will happen; 1) It drops the bolt home. 2) It does nothing.
Running a charging handle has a variety of responses; 1) It drops the bolt home. 2) It does nothing. 3) You do not properly actuate the charging handle fully to the rear, and you don't chamber the round. 4) You ride the charging handle on the return, it does not drop into battery fully, and you may cause a double feed if the first round does not properly eject.
I am not saying you are intentionally doing it, or it is done out of lack of training. Like I said earlier, gear issues, position, flexibility, etc. can affect the effectiveness of the charging handle. But if you can insert the magazine, you can actuate the bolt release.
When discussing the CH and the BC as methods of charging the rifle, we are discussing them without the inevitable possibility of human error. On a pure MECHANICAL level, their functions are not equally reliable. The CH is only capable of one operation, charging the rifle. If all you did was retract the CH and release it, it will always charge the rifle. The BC on the other hand must first catch the bolt before it can be employed for its second task, charging the rifle. When you press the BC does it always charge the rifle??? NO. The secondary function of the BC is dependent on its primary function. Both functions of the BC are completely dependent on the CH. Without a CH there is no way to start the cycle, and the BC would then serve ZERO purpose.
On a pure mechanical level, their functions are entirely and equally reliable. Without human error, their actions will be identical when releasing the bolt on a loaded magazine. The charging handle not only charges the rifle, but it is used to lock the bolt to the rear. The bolt release not only charges the rifle, but it is used to lock the bolt to the rear. The charging handle allows you to charge the rifle on a closed bolt, but introduces human error. The bolt release only allows you to charge the rifle on bolt lock, but is mechanically independent of human interference.
You are denouncing the bolt release as being situationally effective, while saying the charging handle isn't affected by situation or circumstance. This isn't possible. The charging handle doesn't always charge the rifle. The bolt release doesn't always release the bolt. Period.
At the end of the day, those that know how to use both have the option to use both. You can always ignore the BR if you want. Sometimes when I speed load I still hit the CH instead of the BR.