Unhealthy miners go out. Yes. But those are miners with old equipments, or high energy costs. But if only large-scale miners are able to afford the most energy-efficient methods of mining, it leads to centralization in the nework. Which could be bad for censorship, or regulations and who knows. I hope I am wrong. Decentralization is key.

Happens each cycle. We will see who runs a good operation those who don't will close up shop