An individual likely (hopefully) has a moral compass.

A family introduces some perverse financial incentives but you also get long term (ie multi generation) planning and reputation concerns.

A group of practicing professionals who own the operation will hopefully exhibit some shared pride and professionalism.

A co-op or similar arrangement ties the interests directly to the local community.

The larger the public company the less overlap there will be with the customer's interests. At least they might worry about reputation and stock price though.

Pretty much the only concern PE has is avoiding litigation. Their primary motivation is maximizing value extraction over the short or medium term.