The more you'll sue doctors, the more MDs will practice defensive medicine and you'll end up with shit quality overly invasive care. The way to go is to sue the institutions, but not the practitioners themselves. Then the institution punishes the doc if warranted.
In opposition to what you think, doctors are highly egoistical individuals and absolutely do not cover for one another.
We already have defensively practiced, shit quality medicine. I was diagnosed late with ADHD, had to leave that doctor's practice, and finding another doctor who agrees with that diagnosis has been impossible.
The tendency I observed when competency was questioned was to not punish in any way that had strong ramifications. They might badmouth them, but the desire to strip of their license or award large punitive damages isn't there because they are worried about it happening to them, real or imagined.
That is bad also, but does not remove the blame on doctors for defensive-doctoring as opposed to actually trying to figure out what is best for their patient.
In opposition to what you think, doctors are highly egoistical individuals and absolutely do not cover for one another.