Everyone is certainly interested in the long term health of the company. But exogenous shifts like technological change, trade, COVID, etc. might cause the company to go under - or maybe you're just outnumbered by people who make poor decisions.

If this happens, people who have worked at the company for 15 years and have most of their "retirement" in the form of ESOP shares will a) lose their jobs and b) lose most of their retirement savings. On the same day.

Libertarians sometimes fantasize about how if we didn't have the FDA, people would be incentivized to do their own research on food and drug safety. Sure, sometimes dumb people would get it wrong and kill themselves! But that's just the price we (well, they) need to pay for everyone to have good incentives. This seems like the same category.