On the other hand....
When interest rates begin their inevitable upward trek, guess what will happen to home values? Home values will decrease - - it has happened before, as recently as the mid '90s in this area - - and if the economy goes into the dumper for real (as opposed to Democrat / liberal news-media propaganda), then people will have home mortgage debt equal to or higher than what their homes are worth. If there is a flurry of foreclosures, the poop will hit the fan for sure. In any event, since loan-to-value ratios have stayed the same as always for new lending (typically 80% maximum for "cash out"), there could come a time where mortgage debt exceeds the total residential real estate value for entire regions. That is not a healthy scenario for investors.
All of what you say rings true. If the majority of homeowners use this opportunity to lower their monthly outgo and invest or save the difference, great. I see too many people who use the increased cash flow just to buy more "goodies", wear out the debit card on a trip to the south of France or buy a Land Rover. I hope that's not the norm.