Yes, it could be, but in reality, if using an AI for that you would likely to end up on a scam site with very favorable odds, but no intention to pay you out ever.
Easy fix, we could just filter out untrusted sites, or instruct it to only use whitelisted ones.
Another problem with positive EV games is that you need to make many millions of bets to really take advantage of that.
Depends on what kind of bets are we talking about I guess. But yeah, generally speaking you'd need a large number of bets for your average profit/loss to be in line with expected value. Which doesn't mean you can't be profitable in just a few bets.
Side note: sometimes millions bets may not be enough. Looking i.e. at the
BitVest's stats even after 4.7 billions bets, their profit is only at 47.6% of EV (assuming those stats are correct).