Firstly, I trust my physiotherapist/s. The two I most often see have treated a number of professional athletes, as well as members of the Australian Olympic team from 1992 onwards. Whilst I am better aware than most that these credentials, impressive as they are, do not imply possession of all knowledge regarding the human body, they have succeeded in fixing my body up in the past from a number of nasty injuries.
One, doctors don't know everything. A lot of times they're worse than auto mechanics in diagnosing a problem. As George Carlin would say, "It's all guess work in a white coat." Two, pride has much to do with it, but again it's your life. Ever watch the documentary The 'Smashing Machine'? You could learn a thing from Mark Kerr.