Look around in the gym, you going to tell me that you or any of your friends have ever made fun of someone not doing what you think is the right way to exercise? Like you said different strokes for different folks, but let me tell you, this is how I managed to bench what I bench today. Yes I know what lockouts are, Ive done them for years, the most I have ever lifted with a range of about 5" was 640lbs, I bring the bar down each time and the weight slides as well but this has helped me too. Now on the bench, I did this somewhat the same but with a spotter and lighter weight. When I wasnt able to actually bench a full 315 in full range, I made my self feel the weight, bring it off the bar, go down a few inches, do that a few times. Next round go down a little farther and over time you will be at your chest and able to do a full range of motion bench. I also performed other bench press while repping out 225lbs, doing super sets, dumbbells, etc.
The fly machine, I remember I wasnt able to do the full stack of 300lbs, I had to cheat by leaning forward, well over time I found myself not leaning forward anymore, back on the pad, now I do the 300lbs stack plus I add the two 8lb rubber weights plus I add a 45lb plate to the stack with a weight pin I made, so again, it does work if you stick with it.
I also said you will see folks in there that dont know what they are doing, they look around and watch other folks which can be good or bad, now if that person see another guy benching 1/4 or 1/2, he may think thats the correct way to bench all the time, what he doesnt know is what the other guy knows. Then you just got the guys that want to act cool, toss a bunch of weight on the bar and do the same thing by going down 1/2 way and thinking he just accomplished something when in fact, he doesnt know what he is doing. So for the most part, it is BS.
I guess I have to say, I know that as well, I didnt go to McDonalds and becomes a lard *** just to bench a lot. Im lactose intolerant so I cant eat or drink what a lot of other folks can eat. So I drink Carnivor protein, which put the weight on me, fast. I mostly also eat boneless chicken breasts as well, stay away from red meat and at a lot of salads and vegies, so yea, I know that too.