That's what I found interesting about this too, there is a whole rabbit-hole of similar 'experiments' or what have you that people did after learning about Sokal. Another wikipedia page is devoted entirely to scholarly publishing stings (
https://en.wikipedia.org/wiki/List_of_scholarly_publishing_s...). They took place across all of academia, and like you say, end up proving that even the scientific journals are not as rigorous as we may like or think.