What an absurd comment. As if defederation were ever a suggestion? As if it were even possibility? I’m struggling to understand what point you were even trying to convey here.

Did the previous lack of transphobia-specific guidance somehow negate the fact that abuse and bigotry, including transphobic bigotry, was already against the rules and banworthy in this instance? Do we constantly having our finger hovering over the ‘defederate’ button, just in case an instance is not deemed ideologically pure enough?

Well apparently, yes! In spite of the fact that this guidance takes a very sensibly neutral tone, it is precisely that neutral tone (predating this specific guidance, but as a response to the same neutrality that it embodies) that has directly resulted in this instance being defederated by at least one major instance already.

That the fediverse supports defederation does not mean that it’s acceptable for everyone to bring it up at every opportunity, as if it should be the action of first response. Defederation is a last resort for rogue instances, and to bring it up outside of that context is dreadfully gauche.