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.
It's stupid, he will find another way to gamble, there are plenty of other sites where you can gamble, disabling it on one wont solve his issue. Freebitcoin also makes a substantial amount of money from their betting option, I'm fairly sure most newbies just gamble their few earned satoshis most of the time. I know I do, I like using it as a bonus to gamble with it, risk free gambling.