Earlier quoted context omitted.
The thing is, for a long time, deb/apt were way superior to what rpm/yum offered. Heck, Debian had apt way earlier than Red Hat had yum. If anything, Red Hat should have adopted apt. In terms of sheer number of dumb competing initiatives, Ubuntu > Red Hat > Debian.
I’ve never understood the pure love for apt. Ports/pkg is better. Gentoo’s package manager is better. Even yast was better (imho). Once I needed a package from an external repository, apt has almost always fallen down into a pit of duplicate and incompatible dependencies. Maybe it’s better now, but I was burned long ago and never looked back.
Portage is cute but it's tied to Gentoo and few people want to compile their own packages.
Apt was one of the earliest package managers for Linux, for a popular distribution. That was enough to give it a head start regarding packages available. And that's all you need, unless the other solutions are obviously superior from the user perspective, which they're not.