Calling is underrated imo. If you call because you have no clue what you should do, then it's bad. And you should play a "raise or fold" game for a while.. and then you'll start to notice that this isn't all that great either, and calling is appropriate in many situations too.

Basically, sometimes you just want to control the pot size, so you don't want to raise. It can also serve to disguise your hand. You have TP and bet, I call. What do I have? A draw? A weaker pair? A monster trying to let you build a pot without showing my real hand strength yet? Ofcourse this is all situational. If your opponents are passive then calling sucks. If they are aggressive then it can be good imo.