I still don't understand why you can't turn it off.
You use the word "Our", so this is the opinion of your whole raid group? Then surely you won't have a problem with turning it off, because you all agree!
The nerf is optional!

Your /whole group/ feels that the nerfs come to soon? Turn it off.
Downing the content with a buff is rankling? Turn it off.

The problem indeed comes if your entire group does not agree, but you phrased all of your responses in a way that implies that this is not an issue. If this is only your opinion, maybe it'd be better to use the word "my" rather than "we" and "our" as you have been. If this is not solely your opinion then there is literally no reason for you to leave the debuff on, and you have yet to present me with one.

I don't see why the fact that you can turn it off is "beside the point" at all. You haven't mentioned trying to compete with anyone, only your own personal sense of group satisfaction. And if that would be increased by not having a debuff, remove the debuff.