You can also get such big payouts in sports betting without even having to place multiple parlays if you bet with a large bankroll. Furthermore you can aim for such high payouts repeatedly but the consequence is that if you lose, you'll lose a lot of money and probably have trouble sleeping. lol
On the other hand slots do offer big payouts with small bankrolls but that's only for the very lucky. I've been playing slots for years and have never had such good luck. To me both types of gambling are the same.