Maybe it's "you are welcome (to ask me for help/favors, as I am neutral to the task. I might even enjoy it.)"

And "it's not a problem (for me to do what you asked me to do; we have now both acknowledged that I have done something to help you that was not organic to me, but now we can move past it with no further conversation.)"

I bet "no problem" to some people is like seeing someone wear a T-shirt to church. They'd really prefer it if you would put on a suit and tie, even though the purpose of both are the same (cover my body when away from home because that is our current social agreement), because a T-shirt is disrespectful.

Also everyone sucks, it is a problem, and you are not welcome.