He must not have actually watched the show, because this take makes no sense. It was mentioned MULTIPLE times in that 5th season that Topanga applied to Yale when she and Cory were broken up and that she wanted to see "if she could get in." She never actually wanted or intended to go to Yale, but when she was accepted she obviously should have at least considered it. And she did. It wasn't at all seen as "giving it up for a relationship" by her. She just reaffirmed that her relationship was more important than an opportunity. People do stuff like that all time. Some regret it later, most don't.