SIP can be disabled though. You can find instructions here: How to Disable System Integrity Protection (rootless) in OS X El Capitan
A possible temporary workaround for installing QTR or new profiles might be disabling SIP as explained in the article. When QTR and profiles are installed SIP can be enabled again because all seams to work with SIP enabled.
I have not yet upgraded to 10.11 so I have not tested this workaround.
Kees