I 100% get where you're coming from. I am 'on the PTA' (I say this, as there is no committee, its just that I have in the past turned up to meetings and organised events and helped out at other things, so that must mean that I am on the PTA) at DS' school. At our last meeting (there is only one a year), five parents turned up.
Two of the other mums were people who have always helped and organised events, the other two parents hadn't come to a meeting or attended or organised anything before.
At the meeting, we decided, with the head and deputy head, which events we would run that year, where best to spend the money previously raised, what dates suited etc. Me and the other two mums agreed to take lots on.
The other two parents basically asked why the PTA wasn't organising X event, or why Y event wasn't happening this year, and probing the reasons behind that. And the reasons are that nobody was willling to organise them, and me and the other two mums were already committed to doing loads. The head came straight out with it and said that if they would be willing to do the admin, collect monies, set a date, man the events etc, then of course, certainly, it would be great if it went ahead. They said nothing in reply.
Now, I get that not everything has the time or inclination to help. I get that, and its not compulsory. But please then don't complain that the event you would like to happen, isn't happening. And especially please don't complain about it to me. I work long hours, have a toddler as well as a school age child, DH works even longer hours so can't free me up that much, and I am already knackered.
And breathe. And smile and wave. I love this.