Well, that you expose your system to zero-day exploits when disabling security updates is simply a fact, not an “opinion”, so putting such a warning over a post that tells you how to turn off the built-in feature included in the distro to prevent exactly this is definitely not wrong …
It isn’t like anyone censored your post by editing content of it or suppressing anything inside it. You turn off an important built-in security feature of the distro, so people following your post should know what the results of this are (in fact from next year on when the CRA comes into effect it will be illegal in the EU to run systems without automatic security updates and you as a user will be held liable for any damage done from your IP through a system that got hacked due to you turning off the regular security updates) …
(I also find it noticeable that you do not feel the need to mention this in any way or at least tell inexperienced readers that they now should make sure to do regular manual updates to not keep their system vulnerable)
I’m not a moderator here but I personally think such a warning is definitely due in such a topic if it results in potentially making other users systems hackable …