There's a trap out there, actually a lot of traps, around getting involved in things you shouldn't. It ranges from career, relationships, business ideas/plans, and much more.
The premise of why people do this is not easily figured out, but when it happens you can usually find self-deceit nearby. The idea of telling yourself a lie in order to do something in the moment. Just the moment and no further. You find yourself regretting it every time.
One of the ways I've found effective in minimizing the number of times I make the mistake of mis-involvement, is to check my God-given peace meter. For example, I sometimes get pitches to get involved with a business venture. If I find myself debating or squirming inside, I know it's time to stop. It doesn't mean I'll never do it. It just means "right now" is not going to work.
The worst mistake is to move into self-deception and convince yourself that you should do something when everything in you says stop. Your gut is worth listening to.