100% agree with you. Which is why we should nationalize it to drive down the cost since there is currently no downward pressure on pricing. It’s not some “radical experiment” — in all honesty our current system is the experiment and it’s going poorly. Nationalized healthcare works, and from what I’ve seen, is usually of higher quality and service than we have here in the US. Turns out you can adequately staff your hospitals when you’re not trying to turn a profit.
And on the subject of nimbyism, you may be right about commercial landlords, but homeowners are very concerned with quality of life — which also raises home values (maybe not as much as increased density would, but enough that most nimbys see it as a worthwhile trade off). Things like schools not being overcrowded, available street parking, well-maintained parks, etc.