Nonsense. ... And that's exactly why the first part is nonsense.
Why should that be nonsense? The bubble topic is now very present and little is currently rosy. If you buy now, it should simply fit quite well – in terms of features and price. Because exiting "on the way" during the 40 years can be very difficult if you are not financially absolutely secure and very strong.
If prices can double in less than 5 years, and the annual increases are now getting bigger and bigger, they can also collapse very abruptly. The last ones will get the short end of the stick – only whether they bought in 2021, 2022, or still in 2023 is still open.
The idea that interest rates can never ever rise again is just an idea. Should they, which is completely within the realm of possibility, reach a higher level again in 10-20 years, prices will move significantly downward across the board accordingly. In addition, demographic change will hit very hard in at most 10 years. It is already doing so in the labor market. And houses are after all just places to live.