So if this is your take, then you should be perfectly willing to be heavily taxed on all of your bets so that those who can't control themselves can receive prompt and proper care to revert their addiction, and assist their families to recover from the financial ruin caused by forces outside of their control; understanding that an addiction is often uncontrollable without a lot of time and a lot of help.
If you have a problem with that, then you are signaling that you only care about society's strengths, because you are benefiting from them, and not its weaknesses, because you have not felt the gravity of a boot on your neck in awhile. Thus, I believe that your opinion is moot and also in the minority.
Giving the rat a lever to randomly apply cocaine or an electric shock is bad for the rat, even if the rat is addicted to pulling that lever.
Its a genetic issue.
You could end up with children who have the same issue.
There is nothing unique about sports gambling here.
You can extend this to things like poker as well - is that a tax on people bad at math? Of course not, that'd be a stupid argument, because it's not a purely negative expectation game.
Sports betting exchanges are unique compared to other traditional gambling options.