I think your question is very broad and that comment is highly dependent on context. Can you find that comment?
For instance, from a woman's POV, the seducing process is actually part of the experience; so if you're good at conducting them to the bedroom, then you're already "good at bed" (so to speak). In that scenario, you become sexually experienced with women by meeting lots of them.
On the other hand, if we're talking strictly about rhythm, thrusting, lasting longer, good oral, dirty talk and the act itself, then you are correct, greater exposure will lead to getting better faster, yeah.