Do you think "philosophy is p***-easy" is a stupid thing to say?

Yes, your objections have some validity, but that is from your own perspective and those who share it. What you appear to be hung up on is that absorbing all the material surrounding the academic study is difficult, and that many philosophical questions are unanswerable, but the point you are missing is that philosophizing is easy. We all do it naturally. Philosophy, at its heart, is really nothing more than opinion. Some opinions are learned and wise and others are not. Your friend is apparently unconcerned with academic philosophy and is more concerned with the popular form of it, which indeed is "piss easy". To each his own may be a philosophy worth adopting.