Trump ran on “repeal and replace” not just “repeal”. Tens of millions lost their insurance through work, and now have Obamacare. Many are older, with preexisting conditions, and they helped elect Trump. Just repealing it leaves them with nothing, something Trump promised he wouldn’t do. Unfortunately the Republicans have to clean up the mess left behind by Obamacare or they and especially Trump will get the blame. Just repealing isn’t enough.
Too bad. It’s none of his business (constitutionally) and he needs to get over it and go to full repeal before it destroys the rest of his agenda.