I wouldn’t wait for someone to explain it to me. (And I won’t do that since you have already made clear what you think of my opinion.)
It’s quite simple: I claimed that it often doesn’t pay off to build/own. You can just sweep that away with a “Nonsense!” or you can realize that your own opinion from five minutes ago might well be wrong. The next step would be to consider what advantage the person thinking differently might have gotten from making me rethink. If I don’t immediately come up with something plausible, my next step would be to consult the search engine of my choice. Often after five minutes you realize it might be worth reading further.
But: You have to want that. Rethinking fixed opinions can hurt. However, it might help you move forward in life more than stamping people with different opinions as pedantic prigs.
I can only speak from the Berlin/Potsdam area. Here, neither is currently worthwhile :-) For example, we currently have a 10-year-old rental contract in an unusually quite nice panel building and pay €550 warm for 70 sqm. For the next tenant, the rent will increase to at least €800.
We faced the choice of living stress-free as tenants and looked for nice apartments with 100 sqm+ including garden share, or to build instead. The first problem was finding an apartment that meets our wishes. Almost impossible. Then come the prices. Not possible under €1,500 cold rent. Including 2 parking spaces, you easily reach €1,600–1,650. And then the constant stress of rent adjustments. We decided against that. But only because we found an affordable plot. Otherwise, we would probably stay in the panel building.
Our dream house including land costs a total of “only” €550,000 plus interest. We will probably pay more than cold rent over the next 25 years, but we always have a residual value (land + building). And that currently, undeveloped and conservatively estimated, has a market value of: €365,000.