Completely unrelated to my question. Maybe you should start your own topic ....
Just to be clear the person I replied to was adding new information about the requirement to be connected to the Internet to disable SIP. Since your post was about difficulties disabling SIP I don't think that was unrelated and was useful information. My comment about not being able to install a new OS did take the conversation along a tangent of similar security control put in place by Apple (your issue distinct from mine but all part of the new walls we're getting around this garden).
In any case, I think it's a bit much to come to the Forums section of a site called MacRumors and act like you own the place. We're all just sharing information here trying to help each other. If you want professional help never off topic you should look into paying someone to solve your problems. That said I have no need to be here.