Old News But Still Confused

This isnt about wether or not Ken is gay/bi/whatever. I just didnt follow along enough in real time and now I'm left with questions about the situation.
What was the whole story with Ken being found on Grindr/having a relationship with a man? I know he was trying to get proof from the person claiming this but did he ever say why he was trying to get proof? It seems like an odd thing to make such a huge deal about if you really didn't do what they claimed. Obviously, if someone was using his name and picture to catfish people, that's an issue and should be looked into. But if he didn't have a real life, in person, meetups or dates with the guy, why was he worried about it?