But there are also such sentences:

Nice talking to you. Nice talking to you.

You are very kind to people. You are very kind to people.

In this case, it is not a noun.

Hobo, it's very kind of you to bring me the newspaper. Hobo, it's very kind of you to bring me the newspaper.

It is not good for a little boy to do such a thing. Doing such a thing is not good for children.

It's not good for you to do such a thing. Doing such a thing is not good for you.

It's not good for you to do such a thing. Doing something is not good for you.

It's very kind of you to do everything for me. Thank you for everything.