"Not everybody" means less than nothing to me. I understand that you're a dentist and feel compelled to defend fellow members of your profession, however, I disagree with you.
Not everyone that has a heart attack presents with crushing chest pain, does that mean we shouldn't be upset with doctors missing heart attacks in patients who present with symptoms other that one? No, that sounds absurd, doesn't it?
Of course not everyone with my husband's issue has the same problems or same degree of problems, that's hardly the point. And frankly, whether intended or not, your saying "there are so many people running around with problems worse than you," comes off as very condescending.
That said, when I, or a member of my family presents to a medical professional, or a series thereof, whether it's a doctor, dentist, whatever, with an issue and I SPECIFICALLY ASK more than once whether a particular condition is a concern, I expect to receive an informed response and not an out of hand dismissal. The titled, unsupported molar plus the issues described along with my repeatededly saying the words misaligned jaw would have presumably been enough to prompt further investigation. You can't seriously tell me if someone came to you presenting the same way and asking the same questions that you'd dismiss their concerns out of hand.
It would be like if I, as a lawyer, listened to a client complain about someone entering into an agreement with him/her and then blatently going against the terms of said agreement and my not tweaking to the fact that an alleged breach of contract had taken place. That's called negligence and while I understand your wish to defend your profession, not all dentists are as concsientious as I assume you are, no argument from you or anyone else will change that.