I read this with some worry the other day - then here was a reddit thread where a lot of medics queried this, saying the pictures were taken during an active infection, and possibly of different aged patients with different spines. They said that lots of lung infections do this damage anyway but it usually heals over time, and they've seen many patients fully recover over time after having lungs like these from Covid. They also pointed out that people being xrayed in hospital tended to already be ill in some way, which meant that its harder to apply findings on to a general population.
Meanwhile they have had to discount using xray as a diagnostic tool because so many people with Covid at all levels of severity seemed to have clear lungs instead.
I mean, I'm still personally terrified of catching it, think that long-Covid sounds horrible, and am open to any expert here contradicting all this, but it comforted me a bit.
(Also, some posters on reddit feel that the asymptomatic stories are being emphasised to try and make a deeply uncompliant US population take note and start wearing masks.)