I agree with your overall message here.
But, at the same time, I also think "modern" can, sometimes, mean better*. And there should be nothing wrong in admitting that. And I see a resistence in fans of old styles in acknowledging that too. So the argument cuts both ways.
*One example is when I see two games that aim at the same goals, and one is simpler, faster, more intuitive, etc. while retaining similar flavor. But fans of old games will discard it out of "it's all subjective" argument. Eg: I find The Black Hack a better implementation of old-school sensibilities than OG d&d because it has the qualities I point to above. But I keep seeing fans of OG d&d dying on the hill of "descending armor class is great!" or "a dozen different type resolutions and dice types for different systems is great!" or yet "nothing wrong with having to consult chainmail rules for combat situations!". Which I find the same case of people speaking out of personal preferences (instead of rationality), as the people who finds modern is always better that you point to above.