I did answer it, other guns are of a usable size, Sig's, Walther's, Xd's. I shoot them all and have no problem hitting them with my thumb, the original Glock lever was smaller than any of them.
The Sig one might be awkward for you, but it's not for, nor was it awkward for any of the people shooting them tonight at class, and I think there were 3 or 4 of them, and the people shooting them had hand sizes of all different sorts. And I have yet to see a shooter with hands strong enough to use a firearm that couldn't use the slide lever, I have seen plenty that weren't strong to pull a slide back though. Again with gloves on none of the shooters tonight had any trouble using their levers, although I have seen shooters get gloves caught on sights, and in the ejection ports of guns more than once, causing all sorts of malfunctions.
It doesn't matter how many excuses you come up with, the idea of racking the slide to drop it from the lock position was perpetrated by Glock and their reps, to compensate for the too small lever, which was subsequently changed to the larger lever you see today (although there are also the extended ones available).
and I didn't say the release is the same size as the slide, I said that function wise grasping a slide, hitting a slide lever/mag release etc requires the same amount of dexterity and fine motor control. large action motor control is things like punching, walking/running etc. As soon as you are having to grasp anything you are utilizing fine motor control skills.