Unchecked, unanswerable power corrupts. On lemmy everyone is free to create their own sub. Heck they’re free to create their own instance. That makes the “power” of moderators pretty tame.
Compare that to the power a corporate CEO has over the typical employee. Especially since the 1970s and 1980s redefinition of the primary responsibility of the directors of a corporation to be “maximize shareholder value” instead of “maximize stakeholder value.”
Even in (small d democratic) politics, at least an aggrieved voter can run to replace a corrupt, abusive politician. Not many companies, probably no publicly traded ones, have a mechanism for the workers to replace the management. That’s where major corruption by power can be witnessed.