Okay, my mistake I did forget it was inflammable, but yeah, there are other issues with using it for my house, like rodents using it as a nest, and it disintegrating after a few years, which would require me to open the walls to extract it later. Longevity was another reason I was leaning towards mineral wool and perlite.
Fiberglass insulation is not inflammable (which means the same thing as flammable), it is fire-resistant. But yeah if you’ve got the money mineral wool is really good.