Doctors' Mistakes

I get so angry when I think of all the problems that could be avoided if only doctors would be thorough when testing patients for problems. This is especially true right now for many infertiles, who often go through years of expensive treatments to try to conceive, only to be told that they had been misdiagnosed in the beginning anyway and their infertility is actually caused by something else.

I don't think the doctors realise how traumatic infertility can be for a person, so traumatic that the last thing they need is to be told that all the treatments they have had were wrong, and they now need to start again with the opposite approach. Would it hurt so much to be thorough the first time around? Is it so hard to order tests for any problem that seems at all possible? Can they not double check their findings and test again if necessary? 

I know that doctors are human too, and that they make mistakes, but some mistakes can be avoided by proper proceedure and follow-through!!!!