But then your installing it locally. The benefit to containers is they can be deleted.
This does not make any sense in this context. Or anywhere else if you want to get real pedantic.
Also Arch is a unstable mess and requires updates way to frequently
Arch can be unstable at times but that’s part of the deal as is with any distro you’ll install and use over time. Requiring updates frequently is also not a valid argument against Arch as you can choose when to update.
Arch ships to new of packages for my comfort. This leads to breakages if you don’t read the update notes. I want my system to stay updated automatically and Arch causes to many headaches.
Software updates can potentially cause issues in general. This situation is not unique to Arch.
There’s nothing wrong with a rolling release model where you get newer software that’s closer to upstream. In most cases, you get security updates faster and in some instances you get bug fixes & new features from upstream that will take weeks if not months to hit “stable” distros.