It really depends what your expectations about the environment are. Systemd is a large user of very specific functionality that they have good reasons not to replace with something else. Since it keeps running into those issues, it may be more beneficial for wider community if systemd included the missing shims conditionally. They'd be able to put it in CI and treat musl as first class platform so people don't have to report back with similar issues after the release. Not exactly like, but similar to how openbsd has openssh and everyone else has the official openssh-portable.

Their stance is not wrong, but it's probably not what many people would like to see.