I don't see why something has to be "harmful" to be unethical. That's the strawman.
Journalism as a profession is linked to a series of ethical principles, being able to be objective, impartial and have a level of independence is important. These principles are challenging enough when you actually do your job in the most professional manner, it shouldn't be devalued even further.
And if you absolutely need "harm" to be convinced, having people like him parading as journalists is harmful to the few professionals who are actually doing their work following those principles.
I don't have an issue with this guy "existing" (for lack of a better word) - I find it strange that he has hordes of followers for very low level content, which is mainly piggy backing other people's actual work, but if people are happy, that's fine. I do have an issue with people taking his defence when he's just being called out for what he is - a hack with no ethics.