I did just read I think 90% of that, and it just seems like that person is sour about systemd in general.

I agree it's not unix/Linux philosophy but it's the best we have.

Does it do too much? Maybe. I haven't seen that exploited on a large scale in the real world, but it's definitely a golden key.

There are options. But it's just one of those things. You're pissing in the wind unless you're willing to write it yourself. You can use non systemd distros or even use bsd.

All that said, you're absolutely right to be concerned, but speaking on it like it's an active vulnerability is dangerous.

It's also evident that it's reliant on the software you run, it's not systemd that's giving you away, it's your application that you chose to install that's abusing or neglegent of systemd's access.