It is a very good strategy, I consider that each person has their style to play, to pose and that is very valid, in itself what is sought is to have the best strategy that can be adapted to the personality of each person, I personally do not make sports bets every day, I only realize that I have a very good chance of winning, and I think that for me that is only better, whether I win or not, because I also realize that it was what I took into consideration to make a particular bet, Always the most important thing before any bet, whether you win or lose, know why it happened and learn.
Yes, when I don't have good expectations about both teams it's better not to bet at that moment, I always select matches to bet on that I have more affinity with as well, in addition to checking whether the teams are in good shape or not.