Watching the game is an essential part of the sports betting activity. That is where the excitement comes from. At same time, you have to watch the games to draw your analysis and conclusions about each team. A gambler who has his predictions decided only by third party's opinions is less likely to have success on his guesses. You have to develop a personal feeling and intuition regards players and teams' performances.
Maybe this kind of pleasure can never be felt by those who only care about winning bets and don't really enjoy watching the course of match, I sure what feel is just emotional and disappointment because most bets only end in failure.
It just that to make prediction you don't have to see the course of the match first, maybe this will be very helpful but if it is match that brings together two team, each of which is big and strong team, if only big team against much lower team I think the advantage on paper can be seen long before the match starts.
But indeed for beginners or people who do not have much knowledge about sport, for example football, gambler does not have much insight, it is highly recommended to do an analysis when you have seen how the match is going with all the tactics, strategies and the composition of each team players.