Earlier quoted context omitted.
Yes, this is a win for republican democracy, and a loss for "governance by experts."
If we had a parliamentary system, I would agree with you. But the actual on the ground reality is Congress does not represent the actual will of the people due to malaportionment.
If "we had a parliamentary system"--where the executive is selected by the Party that wins the most votes in the lower house--Bush still would have won in 2000 (https://en.wikipedia.org/wiki/2000_United_States_House_of_Re...) and Trump still would have won in 2016 (https://en.wikipedia.org/wiki/2016_United_States_House_of_Re...).
If 'we had a parliamentary system" Biden would be shown the door next year when Republicans again win a majority of not only House seats, but total votes for House candidates.