Nonsense, variance is much less live than online. You can nut peddle live if you have the patience and have a fairly decent and consistent winrate
As others have said, lots of reasons not to play live. Live is also difficult in its own way, it is a very different game to online and so online players convince themselves that the reason they are struggling at 1/2 and 2/5 live is due to variance when the fact is that they are trying to play ABC online poker without regard to the fundamental concepts behind it and it just does not work in a live setting. Simplest example is that opening to 3bb in a live game is lolbad, online player goes "omgz live players are so bad they all call my 3bb open" when in fact live pro is thinking "omgz stupid online player thinks he will get heads up to the flop opening to 3bb".
Don't want to bathe or wear reasonable clothing (Doesn't stop some people)
I would think that would fit right into most rooms. Half of them wouldn't wear pants if the casino didn't require it for entry.