I don't think we can use past time travel experiences to try to predict what's gonna happen, or not, in this universe.
It's a different Universe
Original timeline. If it were an altered Original Timeline then 'timeline healing itself' theorem would make sense but because it's not the same Universe/timeline, why bother?
We all agree the Mirror Universe was not
Orignal Timeline, correct? Events in that Universe differ vastly from the Prime Timeline and we all agree those differences are normal
for that Universe, no healing required so why don't we just see this NuUniverse the same way? It is one of thousands (or more) different Universes as shown in TNG: Parallels
Frankly, IMO, any attempt to mold this universe into a clone of the original misses the point of the reboot.