The main point is that the real meaning has not changed, and had no reason to change, it just became diffuse because of how often people would twist it or simply parrot words without really knowing what they are. That’s what makes it “painful to watch”.

Agile should still mean exactly the same thing as it did in the manifesto - people over process, short cycles, adaptability.

You just described the same thing as the post, but the author went exploring the inner workings of why it happens.