Can’t really tell if this is just humor or you didn’t understand what he posted to you. I’m sure this is something that’s been beat to death on Gun forums as well, and everybody has their own comfort of doing things, but I’ll repeat it anyway just for clarification,
A lot of people, myself included, have been trained and drilled into our heads that it is a slide LOCK, for locking the slide back only, and not to be used as a slide release. Something something muscle memory and fine motor skills.
We were taught to use our off hand up and over the slide, not pinching it between two fingers, but over the top, palm on the slide, with your thumb towards you, gripping the slide and giving a good pull back before releasing it fully to put the pistol into battery, then just sliding your off hand down and back into a good grip.
Some people will say this is BS and the slide lock is also a slide release. I’m not saying anyone’s right or wrong here, whatever works for you as far as I’m concerned, just saying that’s how a lot of people are trained and are training others.
Regardless, glad you found something and the Gods have rewarded you with a fair lot of ammo for it!