There is a vast difference between terms used by marginalised groups to refer to dominant ones, and terms used by dominant groups to refer to marginalised ones.

Whether or not this policy itself is effective or well-considered, the broader mission to identify ways in which historic injustice is ingrained and perpetuated through our language and try to amend it is a noble one.

There are many words throughout history that have been common place but carried so much cultural baggage that they became damaging and were thus abandoned - most terms we now consider slurs were once defended with arguments of similar merits to your own.

The process of improving our language is never going to be an easy one, no doubt many found it challenging to fully excise many of our abandoned terms from their vocabulary, but it's been done before, and will likely be done indefinitely into the future unless we ever reach a point of such equality that our language can no longer cause harm.