This is not how betting works supposedly because you have to know first the opponent before making any bets with your favorite player or favorite teams because sometimes your decision will also depend to this one. Even if you are betting with the top players theres still a risk on that and going all in means you are increasing the risk of your bet and this is pure gambling already, I also not suggest this one and I dont want to practice this in betting as well, going all in is not my way of betting.
Definitely, its too risky to go all in and you favorite player cant guarantee this one.
There are some bettor who took risk to bet like this, some succeeded while the majority are not because betting cant work like this always. I also prefer to bet small money only, and diversify my bettings into different sports which I think can give profit to me, this is actually more fun than to go all in.