They know what feels right and ask to have a bunch of racquets that feel the same. They are not into specs. Feel. You can't play any sport at the pro level based on thought and analysis. If you could, everyone on these boards would be a pro! Pros are animals. They are not in their heads. You can't play tennis at that speed and intensity and be in your head.
Of course it takes a lot more than thought and analysis to be a pro. however, thought and analysis is a part of tennis. look at the the players near the top of the game.
I think you're arguing two things here to convey that pros don't analyze. the first thing being: pros feel first, and analyze/remember specs to recreate the feel. which i for the most part agree with, however, some pros are very peculiar about their set ups, and at the very least have to be sure of what specs they like. pros have asked to get their racquet strung a couple of pounds tighter or looser in the first set in a match countless times. there needs to be a knowledge of string tension at the very least in order to make the request.
The second thing you're arguing is that pros are not able to analyze while playing since they are playing out of their heads. i can agree with the idea that a lot of micro decisions happen in a point, many times those decisions are purely instinctual, instincts that are developed through practice and aren't usually analyzed mid point. However, you also have to realize that most of a tennis match is spent in between points, and analysis of one's game, how it's affecting the opponent, and what needs to be done certainly does happen mid match.
However, analyzing racquet specs and not having the presence of mind during a point have nothing to do with one another. It cannot be argued that because a player cannot think of specs during a point, he is incapable of analyzing specs at all. No one applies lead tape in the middle of a rally.