And, besides, a lot of people don't run Ubuntu, perhaps to get away from snap, perhaps to get away from systemd, or perhaps just because they can..
You never install more software in Linux? I certainly do, it’s why I got it. You can use this to make Windows “distros”. https://docs.microsoft.com/en-us/windows-hardware/manufactur...
I’m not a Windows user but it’s not fundamentally different, Linux can come bloated, Windows can be stripped or another version like LTSC can be used.
There's not a single popular Linux distro these days that isn't systemd by default. Even """hardcore""" distros.
I like systemd and those are the only cases I remember being surprised the usual commands didn't work.