Betting on friendly matches is truly very risky, the underdog may win and have more chances to win if compared to cups and leagues.
Is it because you see that a friendly is a match that is not played with a high focus for win?
I think it's a real risk of a friendly match because the favorite team usually doesn't play more of its star players which make the match very boring in my opinion.
If you are putting a bet you'll never feel bored especially if you are seeing that your team is wining.
believing that the favorite will not perform their best, you should put your bet on the underdog, better odds, and a better chance of winning.
Lost of games in the past that an underdog won in an exhibition or friendly match, so people are attracted to gamble.
Bookies though knows how to play smarty against the gamblers, they might offer attracting odds for the favorite or vice versa knowing that in anyhow there are risky gamblers that will take the call and bet.
Friendly games are not as easy as it is still need some efforts to understand the tempo of the game, just like you said it's not boring you f you see that your bets are winning, while you are monitoring the game.
different types of gamblers have different ways of betting strategies,some might bet with over and under while other loves to take the big risk and bet for the underdog in hope that the value of their bets will give them more enjoyable profits.