Is it right we should pay twice to use our "community rooms"?
How much do you pay in the precept for the parish council? I would suggest quite a small amount and probably not enough to cover the costs of running and maintaining the hall as well as the playgrounds, recreations grounds, benches, litter picking, grounds maintenance etc etc that parish councils also pay for.
In my instance, I had a resident complain that as a tax payer she had a right to a particular service. When I delicately advised her that her parish council tax contribution was about 30p a day, she saw that her demands that £000s of tree works to improve her view were a little excessive.
In your question, the parish council is probably right in that it owns the asset on behalf of the community and they are responsible for running it effectively so that it doesn't become a financial burden for the whole parish. Therefore to charge hall hire fees for those who are actually using the facility is equitable. Those who don't use the facility are therefore not burdened with the true running costs and only contribute through their council tax.