Post 34 is exactly correct..... IF we only want to hit the ball it's hardest, with the most control, but not with the most feel. With the LEAST feel, since it's the sweetspot also.
However, Poster 34 is talking lower levels of tennis, where a tennis racket is any other tennis racket, balls make no difference, and you selection of shot is small and limited.
At higher levels, you can see players using different parts of their rackets to hit the ball. They don't ONLY want to hit hard and solid, they take advantage of the extra length, the solidity of a lower hit, and the extra touch of using the upper part of the racket.
It's like saying....you need ONE first serve and get the second serve IN.
Is that good enough for you? For some, it certainly is. For other's, it's not close to having a serve.