I've got a slightly different take on this. If you want a piano with the option of recouping your investment at some stage, it's true about Steinways. Nothing more to say.
If you're not concerned about that, or much more concerned about the piano which fits you, that's another thing. You may find it in a Steinway. Many have. No arguments there.
But it might be worth looking around a bit more if you're in this second category. I liked the Petrofs I tried, but they weren't quite there for me. I only played on Estonia and was impressed. But then I played about a dozen August Foersters in a row, and the very last one.... Well, it was "sold. I'm looking no farther."
I'm not making an argument for any of those pianos, or against Steinways. Depends on what you want.