I fear most entrepreneurs really do care about leaving a mark. Any mark. Ad tech companies? Big data (selling) companies? Marketing (convince the consumer to buy something excessive) companies? LinkedIn and other companies that intentionally force dark patterns on their users? Security companies selling spyware and hacking tools to anyone who'll pay?
The same could be said about the corporate raiders that run many tech companies. They leave ethics at the door "I'm just doing my job to support my family".
I think people who start their own companies sometimes do so because they can have more control over product quality and quality of life for their team.
I'm confident most entrepreneurs care about leaving a good mark. It's just that people that are intent on leaving a bad mark, any mark, generally have an easier time of it.
The world could do with fewer of those marks IMO.