If the question is our ability to accomplish any of these things at a professional level then we must also assume the opposing team is going to bring it regardless of our skill level. If the pitcher dumbs it down, or the opposing team leaves you open, then it’s not a fair comparison.

I would assume this wouldn’t be used mid-possesion but rather as a way to sub in a player after a shot is made without burning a timeout you may or may not have, or using a foul. I see this playing out as the sub being made as the ball is still being advanced. 

Why not?

The Magic weren’t getting a shot off even if the clock was started correctly on that inbounds. Ball goes off Lonzo and your half-second is gone. Game over. Lakers win.

Because a lot of games aren’t meant to be played however you want? They’re meant to be played the way they were meant to be played, which is the challenge of the game in the first place.