I don’t think the urge to strive/fill is a problem. You might call it the urge to live, actually. Living things are striving things. Humans are unique because to striving/living well is not automatic. Living poorly/wastefully … seems to be the default. Defaults I think are largely driven by culture, unless one bucks this trend and develops his own defaults. Current culture channels striving/living toward consuming/mindlessness/predictable behaviors that that benefit the “matrix”