Well, this is an observation: except for the first response, everyone here has disagreed and argued with you. Is it just me, or is that a case in point? They're defending themselves, as any normal person would do.
Health issues, of course is a different matter, but people do seem to believe so much depends on the equipment--and they are indeed whiny about it. However, can you really expect someone to change their ways? No, they will have their preferences, they will forever.
But then again, you have to look at the demographic this board attracts. Does it attract people who just simply play the sport because its fun? No, it attracts people who see tennis as a little more than that. Therefore, they're going to be looking into every possible facet of the game--including equipment. And, as humans are unwilling to change themselves, see improvement through racquet use as a much faster and easier vehicle to getting better. Of course, there are exceptions, but most people to modify their racquets will continue to tinker with their setups, because "there always has to be a better way."
To a certain degree, its a little amusing.
For those who mod purely due to something as intangible as "Feel," or "response," you're excused.
But seriously, isn't a racket company's primary objective to sell more racquets? Doesn't that mean making *something* that appeals to every possible demographic? Why do people think that its never good enough for them?