Very good post!
My answer will be because we refuse or do not understand why we must learn minimal basic acoustics concepts and how experimenting with them ...
Thank you!
The only problem I see with your argument is that there are people who are never done with their acoustic treatments, too.
Put another way -- I think you’re right that too many people ignore acoustics and focus on gear. But there are people who cannot stop treating their room and that amounts to exactly the same endless chase. So, it's not wrong but it's not sufficient for the more general malady.