Women who ride motorcycles every day can get off just fine.
(And believe me, while they've come close, there is yet to be the vibrator with that level of vibration yet.)
There's never been any actual data to support that theory long-term. Some women report that sometimes, but that's likely a) because the sex they're having is just substandard in the first place, or b) they just find they prefer vibrator sex and don't know how to work that out or c) before using vibes, they never had high levels of stimulation and so assume that what they got with sex before not cutting the proverbial mustard means the vibrator made them less sensitive, rather than more discerning about getting enough stimulus.
Mind, JUST after using a vibe, sure: one might find other stimulus less stimulating. But within just a little while -- sometimes even just a couple minutes -- that should pass, same way as if we rub our hands tgether very fast, for a few minutes they'll tingle.
So, no worries. If it turns into a problem for you ever, best be is just to be sure you're not doing any one thing or using any one specific toy very habitually. Just keeping things varied -- and this'd be the same with male masturbation, too -- generally prevents any problems.