As gamblers, we love more action, so we tend to make more bets on a regular basis. However, experts say that when we make too many picks regularly, our chances of winning decrease. This is due to the fact that we won't be able to analyze all the games carefully that are in our ticket and won't have the advantage needed to win. So instead, it's recommended that we should value quality over quantity if we want to succeed in sports betting.
This is only true if you are betting in rush without doing analysis. You have a lot of time to bet on matches that will happened on couple of days, weeks and months so the reason about you can’t analyze well when doing multi picks is not relevant at all.
I’m not a sports bettor but I’m applying this on blackjack by sitting multiple seat so that I can spread my winning chance rate and for a chance to breakeven when my other hand is bad.