Earlier quoted context omitted.
Lennart didn't just submit the code and put it out there. He lobbied other projects to hard-depend on it, and lobbied distros to adopt it. Systemd didn't succeed where less poisonous equivalents failed because it was technically superior (it isn't), it succeeded because of shady back-room politics.
Let's say you're right. What kind of "political" leverage Lennard had to convince distros to use systemd?
It's in RedHat's interest for software that's currently portable to FreeBSD or especially to Solaris to become tied to Linux. This wouldn't be the first time RedHat has adopted anti-opensource methods out of fear of Oracle - compare their policy of deliberately obfuscating the history of their kernel source.