I never said Steph or LeBron aren't great players. They are. That said, I believe this era is much easier to play in than it was in the Magic/Bird/Jordan eras. I don't think any old school players would have a hard time adjusting to not being touched when trying to score. The reverse is a whole different story. Let guys like Rodman, Parish, Oakley, Mason, McDaniel, or Laimbeer tag LeBron under/around the basket like they did MJ and others. Hard fouls they routinely dispensed back then would be flagrant fouls today. Today's players would be ejected if they hit players like they did back in the 70's and 80's. Back then, all that was the price you paid to get to basket. Can LeBron deal with that kind of physical D on a nightly basis and be better than he is today? That's highly debatable. MJ's scoring average going up with no arm bars, hand checking, or physical D in the lane...that's not.
As far as Steph is concerned. I see him more as a Reggie Miller type player. Both are great pure shooters and had wonderful NBA careers. The only difference is Steph has won championships and played with higher caliber teammates. I don't see him having the same impact that MJ did overall. MJ's offensive game was killer and his D was just as good. This is why he is considered the GOAT by even the legends of the game. As for MJ not being a GREAT shooter, I don't see where you are getting your facts from. In MJ's 13 years with the Bulls, he shot 50.5% from the field (please don't bring up his Washington years, we all know he was old and a shadow of himself then). In any era, that makes him a great shooter. Hell, Steph is a career 47.7% shooter and no one can touch him while he's trying to score in today's game.