$Palantir (PLTR.US)$ Why banks are lending people money at a...

$Palantir(PLTR.US)$ Why banks are lending people money at a fixed rate 3.2% for 30 years(when current inflation rate is 7.0%(as it was in 1982,but mortgage rates were 16% then)?
Are banks willing to lose 4% yearly on those loans?
Are banks that stupid or something else is going on?
Perhaps the inflation fear is overblown, and is only a temporary phenomenon due to the trillions infused to the economy in the last 2 years and exacerbated by the supply chain issues....which is plateauing now and soon will start dropping..
Institutions and hedge funds have been shorting high growth stocks, Biotechnology stocks and spacs for the last 11 months and made Billions so far,now they are spreading "inflation " fears to scare people and force them to sell their high growth stocks, so they can buy cheap, cover their short positions and open long positions in growth stocks.
When people give up on growth stocks and move to value, it is then when markets will do the opposite and move money to growth stocks!