Hard disagree. Everything you learn on Arch is transferable because Arch is vanilla almost to a fault. The deep understandings of components I learned from Arch have helped me more times than I can count. It's only non-transferable if you view each command as an arcane spell to be cast in that specific situation. I've fixed so many issues over the years using this knowledge, and it's literally what landed me my current job and promotions.

Arch is why I know how encryption and TPM works at a deeper level, which helped me find and fix the issue a Windows Dell PC was having that kept tripping into Bitlocker recovery. Knowledge of Grub and kernel parameters that I learned from Arch's install process is why I was able to effortlessly break into a vendor's DNS server whose root password was lost by the previous sysadmin before me when everybody else was panicking. Hell, it even helps in installing other distros, because advanced disk partitioning is a hot mess on a lot of distro GUI installers, so intimate knowledge of what I actually need helps me work around their failings. Plus all the countless other times that knowledge has helped me solve little problems instantly, because I knew how it worked from implementing it manually. When my coworkers falter because the GUI fails them and they know nothing else, I simply fix it with a command.

If you use Arch and actually make the effort to learn, not just copy and paste commands from the wiki, you will objectively learn a lot about how Linux works. If you seek a career in Linux, there's nothing I can recommend more than transitioning to using Arch (not Garuda, not Manjaro, Arch) full-time on your daily driver computer.

Anyways, after about a decade I've recently switched to NixOS. Now there's a distro where the skills you learn can't be transferred out, but the knowledge I gained from Arch absolutely transferred in and gave me a head start.