there is a wide gap between accepting the bloated officioussness and waste that some public industries have/had (not being able to order the cheapest thing, for example, and having to pay an electrician to replace an overpriced lightbulb for example) and the out and out greed of completely free markets.
We can't have a completely free market in health for various reasons, not least the need to regulate the drugs, the staff's qualifications and so on. There is a balance to be struck between hemming in the people who run the admin and supply side of things (photocopy paper, making appointments etc) and the ability to give the best healthcare. There is a reason that private hospitals don't have ER units.
In theory a publicly owned health service should have joined-up systems so that you don't have to explain to the person you're trying to make an appointment with, every freaking time you go for your monthly asthma check up, that Yes, you have to have it every 4 weeks, and yes, you have to do x, y and z before so they need to account for that.
Privately owned water companies sound great in theory: the invisible hand will lead to excellently clean rivers, beaches, full reservoirs, competitive pricing (somehow that rings hollow - regulated pricing maybe?) and investment so leaky pipes are a thing of the past. We know how that worked out.
As with the railways: there is a reason that the actual network wasn't privatised - nobody in their right mind would take that on as a business proposition. But what you did get instead is cuts to servicees, prehistoric trains on the Trans Penine Express and more cuts to services than even Dr flippin' Beeching could have dreamed of. Instead of treating transport as a Public Good and finding a better model.
And so on ad infinitum.
(as an aside: i buy Greeen energy from wind turbines. My actual supplier doesn't have wind turbines, so they buy it in for me. I am sure my actual power comes from coal or gas or something, but what i pay goes to the wind turbine company. That is one way to handle a natural monopoly. It's not perfect but it's better than nothing.)