It’s not a counterpoint, but emphasizes an even stronger point. Few Presidents win a majority of those eligible to vote. But to become President without also winning the majority of cast votes is unusual, and it’s especially important to emphasize when such a President claims they have a mandate due to being “popular”, imo.

which wasn’t the majority, by the way, since not everyone votes

Um, even among the people who cast a vote for President in 2024, Trump didn’t get a majority of the votes. He got fewer than half of the Presidential votes: https://en.wikipedia.org/wiki/2024_United_States_presidential_election