Mostly to keep my personal sanity. Joking aside, IMO having to depend DKMS to correctly build the kernel module on kernel update every time for something that is network related isn't something I would consider rock solid for production. It is great when it works. Not so great when it doesn't.

Packaging WireGuard for Fedora, CentOS, and RHEL has been super fulfilling over the years, but DKMS is super fickle and buggy. wireguard-dkms is a package I would love to see drift off into the sunset if RH backports WireGuard into EL kernels.