I agree with you, but simulation games were a whole genre back in the early 90s. It has almost completely disappeared. Remember Microprose? Remember Maxis ? Remember Did ? Bullfrog ? They were all huge businesses dedicated to educated/curious gamers back then. Paradox falls into the indies - they clearly do not have much means (while they make great games).
Paradox has transitioned into being a niche publisher, particularly since merging with Slitherine. Also, DiD was, I believe, making simulation software for the RAF.
I do really miss Microprose and Bullfrog. As a wargammer, I would add SSI, SSG, and Three-Sixty to that list as well.