Quite agree with your submission, this is actually one of the reasons why I always prefer betting on sports anytime I have a low bankroll, over playing slot or casino games.
Slot or casino games are not games to be played wit a small bankroll, for like you said, the gambler must have ended up with an empty bankroll before he or she gets an opportunity to win some good multipliers or free/bonus spins which could help or assist the player to winning a handsome amount of money.
For me, and in general though, I still believe winning in slot games isnt much about how much time a gambler spends playing, but it's more about how much lucky the gambler is, but then, it still makes more sense to play slot games with good enough bankroll than with a tiny one.
This was the quote for the casino games and not for the sports betting,because the sports betting was the single result game.But the casino can be played with the many part of the game,the gambler can play 100 games using the 100 dollars in the casino.But the sports betting had the one game and all the bet in the one.So the betting was placed on the same game with the hundred dollars.The slots game was played with the prediction all the time,but the game had the tactical analysis will gives profit to the gamblers.