How silly is this

Well, it is about a Derbyshire choir and appears in a Derbyshire newspaper, so if it is a windup there will soon be a refutation by locals who know the truth.
www.derbytelegraph.co.uk/news/derby-news/derbyshire-constabulary-male-voice-choir-1418330 .

It was some bod, a police commissioner or similar who disassociated the police force from the choir until such time as they admitted females.
It's a very sensible idea to keep male voice choirs as male. Imagine Welsh MVCs having women in them, it's just not the same sound, besides, consider that there could be allegations of inappropriate behaviour levied against those men such as 'His leg touched my thigh when we were on the second verse'.
Blooming stupid.

They are ex-officers not serving policeman and the choir will continue as a community choir. It was merely pointed out that a police choir should be inclusive of all police. Pavlovian response to headlines sells papers and creates outrage but doesn't spread information or encourage thoughtful debate.

Has anyone an answer to my question?
If a woman has the required vocal range for a "male voice" choir, what's the problem with her being in it?

Stupidity is like Herpes. If you're afflicted, you never quite know when it will appear.

She may have the range but the actual tone and depth of sound as opposed to the baritone of a man, will never quite sound the same.
I can't see why men can't have men's clubs and choirs and women have theirs. We don't need to live in each other's pockets or be equal in EVERY way. It's a fact that we aren't equal and never will be and I, personally, prefer it that way. Neither is superior overall. Each brings qualities which may be separate and those that overlap.
Women's football is never as exciting as men's (unless you prefer women) nor darts, snooker, weightlifting, tennis, golf.
I much prefer male hairdressers as I think they're better at their job and I prefer male voiceovers on documentaries. It's all a matter of preference and I have never felt inferior or unequal to any man.

Agree with all you have said GabriellaG. I believe In a quest to be equal in every aspect of life we are actually becoming politically correct for the sake of not for the benifit of it. Everything we say or do cannot be on the premises of enforced equality, it ends up being counter productive IMO

This is actually quite a trivial situation, compared to how things will be if proposed changes to the Gender Recognition Act go through.
Please consider signing the petition in this GN thread-
www.gransnet.com/forums/aibu/1246269-AIBU-to-ask-if-you-are-aware-of-the-petition-on-gender-identity-and-womens-rights?pg=4