This is exactly the kind of gaming behavior of a player who considers himself experienced, in my opinion, is wrong. To rely on someone else's opinion in those sports that you do not understand, this is a manifestation of an irresponsible attitude to your game. I do not think that truly experienced players place bets simply after reading or watching content on games that they do not understand from some third-party experts or forecasters. This somehow suppresses your own game and does not bring such pleasure. But this is how it is in my opinion. However, there may be another point of view, I admit it.
Well, you are right though but a lot of players who just consider the game as luck usually want to try out on different games with other people's prediction because they don't know where they are going to be lucky, that's why some people bet on so many games, even if it's not their favorite, they will stake on other people's prediction.
Some people too are very principled, sticks to one favorite game, make their own prediction and win often but that doesn't means they don't lose because they are betting on their favorite.