Blocking public services that naturally have a pricing advantage over private businesses because they're supported by tax dollars. Like if you're gonna drag Republicans for not living up to their free market ideals this really isn't what you should point to.
People said the same thing when they opposed the public option in the '00's and the rationale was the same. "Competing" with government services is just roundabout price controls. I'm zero percent opposed to such things when the market fails to sort itself out but I can see why strict free market adherents wouldn't be on board.