Bike fit / correct riding position

How about if you ride a bike that quite obviously doesn't fit you, but it's not uncomfortable? Is that ok, or are there demons of pain squirreling away inside you ready to break free at any inconvenient moment?

i guess you would have to ask a bike fitter that.
before i bought a road bike i rode mountainbikes, only after the fitting for my pista did i realise i was curving my lower back and compressing my spine in this position when climbing seated. i put the back pain down to what happens when you ride hardtail mountainbikes all day.
i have now changed the way i sit on the mtb to something similar to the road bike and pivot forward at the hips and keep my back staight, i don't have back problems anymore.
people seem content to ride around hunched shouldered in one position all day, i'm not qualified to say if it's doing them any damage or not.
i'm surprised people are prepared pay quite large sums for exotic frames and wheels when the bike doesn't fit them. if they went to a frame builder (or just a bike fitter) they would spend less and have something that fitted them, the price you pay for being cool i guess?