SE will do this to create a time sink. I also know they will do this because they don't support multi job play despite their claims to the armory system. The relics aren't hard (after the original questline) but instead time consuming. Atmas, the Animus books, Alexanderites and the Nexus were all very easy and only required you to do what you already do, run dungeons, do fates and get materias. It was just very time consuming, especially the books and the fates in some of them.

Plus idk if you know but SE is a massive troll lol