Because he has no intention of avoiding conflicts of interest. He didn't last time either. He had the US government paying his hotel a million dollars per day for rooms and food for secret service and other staff. He sold fucking bean ads from the oval office. And nobody did anything about it. Nobody will do anything about it this time either.
He was already facing multiple legal and civil cases when he ran in 2016 and he's been held accountable for literally nothing. He straight up stole classified documents, then "lost them" and faced zero consequences.
So I'm pretty tired of reading this shit. Either do something about it, or STFU. None of this is news. This is business as usual for him. But the news companies are fucking pumped about being able to harvest clicks over his every asinine word for the next four years, just like they did the last time.