Because Microsoft has back channel influence on systemd development^1^
It's fine now, but the future trajectory is locked into the path Android has followed - extending dominance over all widely used distributions, then gradually using that dominance to choke and extinguish any alternatives.
Additionally, I saw a site around 3 months ago that VIGOROUSLY documented the financial ties from amutable to Microsoft and Google. I have been looking for a good 20 minutes but can't find it. If this rings a bell for anyone that can remember more details please comment!
- Lennart Poettering was a Microsoft employee until recently