Earlier quoted context omitted.
It is your filesystem, but these are system files. Is it really important to you to be able to muck around the OS? If it is, then you go find a way to disable the protections. Windows also has the System Integrity Protection equivalent.
Yes. I am disabling/removing shitty bloatware and removing apple phone home gor privacy.
If I may say so though, I think you're coming at this the wrong way.
Trying to disable every component in the OS that phones home simply doesn't scale, may I suggest you explore gateway firewall devices such as PFSense, or the free version of Sophos' UTM if you prefer a more polished UI?
I use a Sophos UTM at home and I can see (and block) every request that my Macs use to try to phone home, with HTTP, HTTPS or regular network traffic.
I also use the Always-On VPN on my phone to apply ad blocking at the firewall level which protects my phone as well.
Very much worth checking out. Gateway protections are the only way to go these days IMO.
Edit: Just to add, at first glance I find the SIP system to be rather anti-user, but people in this thread are right. It's valuable protection to have in place. If I used a Mac at home I would only disable this to make the changes I needed before turning it back on again.
Edit to clarify: I use a Mac, but only has a HTPC and not as a desktop or workstation, and all outbound traffic is blocked by default.