From what it sounds like, you are one of those folks that has the mindset of "All corporations are evil! If there is a problem, blame evil corporations." My own philosophy is that while there is certainly a good deal of corporate wrongdoing, strong corporations (and by extension, capitalism) is what separates rich, successful countries from worthless 3rd-world countries.
Philosophical differences aside, the presence of insurer profits does not moot the need for tort reform. They are two issues that may be related, but are not at all the same. Perhaps I'll attempt another analogy: if a patient comes in with an diabetes and COPD, you treat both.
If physicians are getting slammed with stupid, frivolous lawsuits by greedy patients, that isn't ok just because insurance companies are still profitable. Would tort reform only be justified if all insurers were going bankrupt? Why wait for that to happen? I'm sure that when you become a physician and start getting slapped with frivolous lawsuits, you will start to understand.