Wow..... So much fail........
No need for that brother

we've all got opinions, none of which are a "fail" they are just different ideas.
Back - on - to - slings.

-If you take the lack of slings as a TTP/SOP becuse you had to did it on a course once, unfortunately, I respectively believe you are mistaken.
-If you choose to train without, so be it, to each their own. Individual experience will dictate.
-The sling is also there for weapons retention in the case of incapactitated or CAT E soldiers. Should you drop it when hit, at least its still attached, and if it is not crew-served or a section weapon it will be evac'd with you, and not left behind, nshould it not be able to be retreived. Ie: dropping it over a mud wall, out of an air sentry hatch etc. That would also apply to police, unless you want to leave a restricted/prohib laying there beside a pool of gooey stuff in a populated area, may not be a good idea
-The only times I've gone without a sling. In crappy forrests in Canada, and to be taught "Lessons"
I hated not having a sling as c9/c6 the most. That was horrible, and we learned nothing from it. Its not an SOP or TTP, its just a mindless punishment that has been used at least for the last 11 years for either not having your weapon in arms reach, or having it slung at the incorrect time. For us it was the #2 C6 in the Pl had his MG slung on an administrative road move, and the old senile course WO lost his ####, and took all of our slings. Some were even personally aquired VCAS/VTAC/etc.
When I approached the staff about how we wouldnt learn how to properly employ the gear if they keep taking it away, and that they are making the issues worse............ all of a sudden we had our slings back. That was a one-off exception to DS staff actually listening to a candidate, and heeding common sense. That was the 3rd time we lost them, and maybe they were just waiting for someone to nut-up and call BS.
I also use a padded VCAS on the 16", I highly reccomend it, I used it on a couple Ex's and a tour, and it held up fantastically. I'm going to be looking at the M24 setup for a hunting rilfe, I'm not a sniper, so I wont get it too dirty, but I own bolt guns, and I'm a kit slut sooooo........