"It seems many people just start dreaming about the flop"

...or they just wait for profitable situations after flop. The better they are and their reading skills, the less often they need to hit. Limp-calling is yet another line, but it has bad name because every poor player uses it for wrong reason.

Limp call only small PP's and play fit or fold postflop = you're easy to read. But if you add some small SC's, light flop raising here and there etc. - you can balance your game and be less vulnerable to exploitation & attack weak points of opponent's strategy.