Most non-systemd users are either contrarians or people who don’t want to switch their workflow from some other system that they already know perfectly.
I will always welcome alternative systems on principle alone, but at this point there is not much need for linux “consumers” to consider anything else (unless their distro doesn’t ship with systemd of course).
I don’t blame people for thinking that something is off after reading the linked blog post. This wouldn’t be the first time Google does something like this to OSS that poses some kind of potential threat to their business model (this is also mentioned in the post).