The mindset of these mega-corporations is that mining is a speculative investment that they will hold onto for years, even if BTC goes to $10k. They or their investors are used to losing money for 10 years in other business models then making up the difference later. They are perfectly happy with 10% returns per year. They probably can't sell the equipment or close up shop because they usually buy the land, pay to build the warehouses, and depreciate the miners. It's extremely hard for them to liquidate even if they wanted to.

So as miner prices go down, they will buy even more, which will put a damper on the price declines. I won't be surprised if new S19 95T units cost $5000 each if BTC is worth $10k.