I can't be alone in wishing that would happen. Yes, people would lose a lot of money (potentially everything), but they played stupid games.
But not refinancing afterwards into a low fixed rate may come back to bite them, and soon.
I understand the tax logic you are speaking about, but I think tax benefits are sometimes oversold to convince people to buy things (like homes and investments). You aren't a corporation, your liability isn't limited. Trying to shave a bit off taxes may have less benefit to you than the peace of mind of not having to juggle debt. You seem like you understand that when you talk about refinancing asap, so I think you know what you are talking about as well.
The other option was to instead take a margin loan out at a hair over 1% blended which is tax deductible and incur no tax bill.
There was a bit of risk in this yes, but I came out way ahead despite there being a pretty sharp pullback right after I closed on my house. I wasn't leveraged to the hilt at all, I think I had a loan equivalent to about 25,maybe 30% of my portfolio when the market pulled back.
If you have significant assets this is something you should be considering. This is imho one of those "rich guy" things that's available at a relatively low level of wealth, and the risk associated with it is well worth it in most cases.
People will pay more for diamonds that are less likely to have human rights abuses in their supply chain.
People will pay more for eggs if you don't keep the chickens in cages.
People will pay more for money if the government gets a smaller cut.
My theory is that eventually the unemployment rate will start rising, and people who lose their jobs that just got a 600,000$ 2/1 will be in a pretty tight spot. It would lead to either cutting consumption in other parts of life, defaulting on the house, or selling for a loss. And so on and on...
What's the strategy behind the "7/1 ARMs cash out refi" and the second homes?
It's curious that would people do an ARM when interest rates were at historic lows no? Were these second home as in part vacation home, part AirBnBs lets?
I know too many folks who did 7/1 ARMs cash out refi to purchase another home in a 7/1 ARM loan, banking not on cashflow but appreciation.
I know of folks who bought homes using margin loans in their stock portfolio.
If housing stagnates, there will be margin calls, leading to supply shock, and price declines. Especially now that mortgage interest rates have nearly doubled year to date.