Because the original sriracha sauce comes from Thailand: https://en.wikipedia.org/wiki/Sriracha

> It resembles actual Thai sauce about as much as Kraft “American cheese” [sic] does a good English cheddar. (Although unlike this comparison, Sriracha arguably improved on the original.)

Thai people hate the americanized version of sriracha, so I guess your comparison is right that Huy Fong Foods sriracha is like the Kraft “American cheese”.