I agree with everything you've said. It's also completely irrelevant to the question at hand, which is whether there are any real, noticeable physical differences between the sound produced by a Strad and that produced by expert modern luthiers.

I certainly appreciate all the emotions and culture that go into making beautiful music on a cello. But it's important to separate that placebo affect ("I think it sounds better because I know it's a Strad"), from the real physical differences, because people have gone to great lengths to find "the secret of Strad": was it his varnish, the Maunder Minimum, an extended drought, special wood treatment to prevent woodworm, etc. etc. Except time and time again we find there is no "Strad secret", beyond his expert craftsmanship, attention to detail, and fundamental changes he made to the shape of the plates of his instruments compared to his predecessors.