I agree with the point about everything not having to be about a serious relationship, but the reality is that many of us are looking for a serious relationship, and we need the other person to be somebody that we can have interesting conversations with and whom we can respect and be challenged by intellectually.

I also agree on the much lesser degree point, but I do think that somebody who is extremely introverted and intellectual is not necessarily making a big mistake by limiting their romantic pursuits to people who aren't extreme extroverts, for example, or limiting themselves to people with the intellectual equivalent of a college education and an ongoing passion for learning.