I'm perplexed by the motivation of this article: who's giving "armchair suggestions about how other languages should embrace Zig-style generics" and why should

I'm perplexed by the motivation of this article: who's giving "armchair suggestions about how other languages should embrace Zig-style generics" and why should anybody care? If it's a bad idea, and someone tries to implement it, they would find out by themselves: there's no need to attack them for their different tastes. And clearly it is only a matter of different tastes (i.e. wanting all languages to be just about the opposite of Zig/C++/D etc.): the choice of traditional compilation is ridiculed rather than understood as a deliberate and useful limitation and the worst accusation against "templates" is that they are inelegant and that they lead to messy error messages, not that they are limited.