I think that's because in sports betting you don't have an option to double your bet amount every two seconds, so in a worst case scenario you just lose your initial bet and that's it. I suggest you to deposit on a dice not more than you usually pay with sports betting, and thus you won't be losing big amounts in an instant.
My worst moment is when I'm so unlucky that having Aces full of Kings I lose to a guy with four of a kind.
but well it was the only way gambling could be understood by you guys.
you cannot always to expect to win even with every good things in your hand already.