Here's a reason: because any bill which "repeals every word of Obamacare and replaces it with nothing" will not pass Congress—and because doing nothing leaves Obamacare 100% in place, along with its devastating consequences for American workers class and American business.
Politics is the art of the possible—not the whimsical.
"Drain the swamp" is a great slogan, but for the moment, we have to rely on many swamp-dwellers to pass anything that gets to the President's desk...
Thank you.
Unfortunately we also have ideologues.
Real and fake.