Belief has nothing to do with it, these are cold hard facts.
Fracture is worth using if you can regain the TP expended before the next start of combat. It's worth is a very small and insignificant DPS increase on a class that already does low DPS. On any content that is relatively challenging, it will likely rarely/never be worth using (most challenging content involves longer fights).
You can even apply "challenging" to fresh 50's doing AK, fights will last longer, making Fracture a net loss of damage and enmity if used.