It's a tricky one, and while it looks hypocritical at a high level, there is one fundamental difference I believe.
I certainly agree that in an overall societal view, gambling on games is very much low on the scale of atrocities when you consider there are guys playing who have beaten blokes to within an inch of their lives, convicted wife beaters and drug dealers.
However, while having these players in the game is a very bad look, it doesn't weaken what I believe to be the fundamental integrity of the game (i.e. the will to go out and play to 100% every week to get the win.) Gambling on the game, especially your opposite number to score against you, implies that you will deliberately not play to the best of your ability (throw the match,) and compromise the fair contest in order to financially benefit. That is a direct attack on game itself. I understand if people don't see it that way, but that is the one distinct difference as to why I think Simona should never be allowed to play again, it's the same reason why I believe dopers should never play the game again either, they are trying to circumvent a fair contest.