I only really bet on the games I will watch, any other bet would have to be a lay away type hedged bet for me to go ahead with it anyway with zero interest in watching that match. Maybe not watching is a system that works for some, but surely you read about the match you have bet on and get some commentary that way. I dont understand otherwise
I want to assume you are not a professional gambler, maybe you only gamble for fun. If you gamble professionally, you will understand that it is not so possible to watch all matches before placing bets.
There are some bets you might need to place but considering the history of the teams, the highlights you might have seen so far, you could be sure that your predictions would be right and you just go ahead with your bets.
Watching a match before betting is good but not watching will not stop you from betting. It’s possible to make a good bet without haven’t watched a match, like you mentioned following news and highlights can help out in such times.