I don’t care about being “nice,” I try very hard to be good and sometimes that comes off as “nice,” but generally being good improves my life, the life of my loved ones, the life of my community, and sometimes even the world, if only very little.
Evil people can be nice too, is the problem.
There’s also:
Brain: Okay, time to do things!
Body: Ehh… Later, let’s just lay here and have anxiety about not doing the things