That's such a specific scenario, and honestly, I think folks tend to undercook the loneliness angle. The classic struggle is all about the immense power—you know, accidentally wiping out a mountain because you sneezed as a dragon, that sort of thing. But imagine the isolation of being the only one who truly remembers what it was like to be human, or even just a regular shifter, for millennia. Every connection you try to make is filtered through this constant, subconscious fear that your very existence could erase them. You'd stop trying after a while. The challenge isn't just control, it's finding anything worth not breaking.
It bleeds into the myth-making too. Maybe they crave the old stories mortals tell about them, the ones that get it all wrong. They have to hold back so much raw potential that it becomes a cage of their own making. The real danger might not be losing control, but choosing to relinquish it because the burden of perfect, eternal vigilance is too much.