Arch users are irritating, and thus the things they use are irritating. Since I, a debian user, am far too stable to ever be considered irritating, I possess a divine remit to pass judgement on the plebians from the lofty heights of my palanquin as I am borne through the forums on the shoulders of swarthy former Ubuntu users who are repenting for their past poor decisions through service to the agents of the Most Radiant Distro.

Or something, idk. As far as I can tell it's just linux tribalism that's been going on so long nobody remembers why they do it anymore, APT hates Pacman because Pacman hates APT. There's incredibly niche usecases that get thrown out as justification but who even remembers at this point.