You're classing essentially nonprofit Linux community efforts as "3rd party" then you're comparing it to one of the flagship products of one of the largest tech companies in the world. Are you even listening to yourself? This is absurd.
I actually wrote a pacman wrapper in Bash that makes it feel a lot more like Homebrew: https://github.com/pmarreck/pac
There are trade offs everywhere. Considering it takes an entire second to add brew to a machine, it's not a big deal or what I would hang my argument on. I've spent much more time messing with packages in Linux versus troubleshooting brew. I disagree it reinforces anything. I'm using a lot of rust tools on my CLI today and they're all available via brew, on Linux not always because the developer isn't targeting all of the different Linux package managers.