Because it is making Einstein out to be some sort of rebel like who wants things to be "relative" as if it is a religion or philosophy of some sort.
Relativity is just what he discovered, not some ideology he set out to prove or invented.
Then the author goes on to try and apply this relativity to all aspects of the world, try to make puns on it despite Einstein specifically telling him that it is explicitly only about those physical and mechanical facts.
It is like the whole article author tried to apply this idea in the exact way Einstein was annoyed about, perpetuating the same misunderstanding described.