This is really amazing how people chooses single bet, but in reality that doesn't confirm due to several times folks tend to bet all over again. Often times we used single bet as an escape from reality and addiction comes when everyone desired to recover every loss after certain bets. On my side of opinion, better use multiple bet if you do have enough money to risk on one time gambling and wait for whatever results it might come up.
Before placing the bet in multi bets, they dream of winning at least 2 games, and they say they can accept the risk of losing the money. But then, they lose the games and their money, and that makes them feel sad. We can use multiple bets if we don't think much about the loss that can happen at any time. But many times, people regret why they choose multi bets.
I think it's up to your risk aversion, I mean I do multi bets or parlay, but there is a danger that once you missed only one bet, they all bets are lost, so if you are willing to take that risk then there should be problem.
That is what our concern with any bets, whether it's multi or single bets. As you said, if you are willing to take that risk, we don't have to think much, even if, in the end, we are losing the money because we can accept anything that will happen. Besides accepting the risk, we need to know how much money we need to use for one bet, so if we lose the game, we can know how much we lose.