This is a legit point he makes.
I think ending the filibuster would be an enormous mistake, whoever ends it. It will create chaos with laws coming and going every time the senate majority changes. I understand the feeling that we should change it now, but it won't matter if we do or don't. Whatever Republicans pass now, Democrats will use a simple majority to eliminate when they are in control.
Maybe it seems like the right thing to do now, but that will change if Democrats win the senate. The problem we have in this country is the left controls the schools, media, and courthouses. This was all by design and it took many years to get it done. Republicans have to start thinking long term like that. We need to end the indoctrination of children, balance the media somehow, and start packing the courts with honest judges. To do this we need to play smart and win elections.