What your doing is reading by the lines and not taking the point. You are talking about grenade, i`m not 12 years old kid, everyone knows there is a grenade in the game, and i already explained what the problem with the grenade are, but you was that stubborn to not get it, just because it does not suit your view.
Go watch some of the pros/streamers, grenades are used not to finish a fight, but to engage the fight. How you going to throw grenades, when you don`t have, because you already sued them? How hard is that to get it ? I need to write this like 20 time, in order for you to maybe read it or get it.
And again, even if you not throw your grenade and keep them in case for Lifeline auto-revive, there is like million situation where you can`t land them. Firstly you got 2 guys who will be shooting at you, its depend on the distance on the situation and many more. There is also like million way to block your way or sight to there, like Caustic traps/ult, Bangalore Smoke, Gibraltar dome, ult, Wattson pylon, Wraith portal and like 2983982397276397 situation where you cant just use grenade.
And stop with the thing that its easy to aim the grenade, when 2 people are aiming at you, and you have a big shield to bypass.
Even pro player like Stooj missed with grenade, and no one was shooting at him, at distance like 20-30 meters, and he was on top of the building.
Same with the push, there is a million ways to stop this. And its most of the time you will be low, if you push it mean you are taking more risk and the danger to being down is big, so that make you vulnerable to be killed or even downed and more vulnerable to third party.
But for that you need to think it, not just catch for 1 word and here is my counter argument.
Not to even mention how unfair that auto-revive b.c. is, and that is taking the kills out of the players.
And no its all muscle memory when 2 or 3 people are shooting at you.
As far as strategy goes, everyone have, but there is broken mechanics, there is OP mechanics, and there is bad mechanics, that should not exist. And every situation is different. its also depend a lot of your skill level if you can pull that move out.
I`m playing FPS game for like 20 years, so you don`t need to tell me that you actually have to think in games, its obvious. I was a very good Warcraft and a dota player, same for CS:GO, so don`t try to teach me how the things work i know it by myself.