The senate doesn’t actually need a supermajority to end a filibuster; they approve the rules that set how many votes are needed to break a filibuster with a simple majority.
Similarly they can replace the parliamentarian at will, as republicans have done in the past, but chose to keep a parliamentarian that prevented them from using budget reconciliation to fulfill their promises to the voters.
They saw “Look at all the cool technology capitalism is going to bring us!” instead of “Holy shit capitalism will use this amazing technology to make everything worse”.