Even in purest capitalist sense, romantic relationships cloud judgement and point at a possibility (inevitability?) that people in question (CEOs, managers, owners, board members) will do that again thus increasing the risk to the business.

This ignores the direct consequences like "worse" employees getting promoted (affecting business) or put in charge, or like in this case, potential national security issues.

> arbitrary things

I'm sure Jenson knew sleeping with his direct reports was wrong. And that plenty of CEOs got fired for that. Nothing arbitrary about that.