well their homes aren't going to go down in value lol
In the $500k-$5m range I don't see any houses losing value. At least not on any significant scale. Given a 30 year time period, and no other outlying issues (oops, your house is in a liquefaction zone), your house is going to increase in value.
Most if that appreciation is due to the steadily loosening standards since the early 80’s when a similar inflation spike drove up interest rates and gutted the housing market.