As a governing philosophy, the left requires doing things. The right just needs to NOT do things, and it's always going to be easier to kill bills than pass them as long as you need 60 votes.

It's fundamentally anti-democratic and (in my opinion) more of a hindrance to progressive legislation. Because it's at least possible (while probably not likely in the near future) for Democrats to make enough permanent gains in purple states to maintain a Senate majority someday. Whereas as long as you need 60 votes to pass anything, it's going to be tougher to pass the types of huge bills that we would need passed. Whatever status quo needs to be changed will only be maintained.