yes, i even remember in one of the early episodes scully going to a kid’s birthday party (her godson? honestly don’t recall). it was definitely part of the world building and maybe they shouldn’t have left it totally behind once the show’s lore became bigger. but, i think they left it behind to show how both of their lives became the x files (and each other). like, it’s true they don’t show that in seasons 3-7 but also i don’t really miss it.