I'd seen a couple of posts from you recently that sounded like you were discouraged. I get discouraged sometimes too! But I wanted to share some information I recently learned from my dentist that seem to relate to some of the uncertainties you've posted.
You mentioned a molar fulcrum. I had one too. That means that one of your molars is significantly higher than your other teeth, so that when you close your teeth together, it hits that tooth first and it slides all of your other teeth forward. You end up beating up your front teeth and wearing them down. This usually happens so fast you aren't aware of it happening at all. Some people never have pain from it, some have pain right away, and some develop pain after a time of using this kind of bite (me). It can be caused by an improper crown (me again) or just by tooth wear, I think. There are all kinds of different terms for this, but basically it is in an interference in your bite.
The treatment is to remove the interference and even out your bite. Sometimes, as is happening in my case, removing one large interferences reveals other smaller interferences. (All of my back teeth are reconstructions and they don't work together very well. It takes times to eliminate them all. When they are eliminated, your bite will be farther back than it was.
This doesn't mean the treatment that some people are receiving that moves their jaws forward is wrong. These are two different types of treatment for two different problems that result in similar symptoms.
It has taken me a long time to get a good handle on this. I hope this helps you!