If he want that on his account then maybe he has a problem with gambling and lose a lot of money, then maybe admin should think if possible to let disable who want the betting option.
It's useful also to prevent accidental betting (ex. wrong clicks and similar, it's unlikely but possible).
However the gambling part is the main source of income of this site (because there are no ads), so I understand that the admins don't like the idea to make it deactivable.
A compromise can be this: if a user wants to disable the gambling part (to use only the "earn btc" feature), also his faucet is disabled. But it's just an idea.