Interesting. From chess it seems that, for important matches, players will deeply study each other's games and try to get the other player into positions that they may be less used to playing and less comfortable with.
Its more important to smoothen out your own weaknesses than looking for your opponents. A weakness in your style of play is going to make you lose way more many games than your ability to find some weaknesses in some other player.
To become a pro you have to go through insane levels of competitions, you need to be strong, not find a weakness in the 100's of players you will face to just have a shot to become the lowest level of professional.
Is this not done in go?