Obamacare, deliberately or not, was a political trap designed to ensure that we went towards universal health care. It was flawed even if it had worked out as intended (with the non-gutted medicaid expansion), and those flaws would exacerbate over time, but going back to the status quo ante (which was also unsustainable, but so many people simply didn't have healthcare that they didn't notice) would become politically impossible, so the only way out is forwards.
Medicare for all was going to happen one way or another, but the GOP makes it easier because by making healthcare actively worse, they stoke the fires of activism that call for people to push improvements that they would otherwise care less about. If we're talking about the boiling frog analogy, the frog doesn't notice if the temperature is climbing at Obamacare rates, but the frog sure as hell will notice and jump out at AHCA rates.
