You'd think help on the caring side would be better, Hunty, but in practice looking after a disabled child can be a specialist task, and the child can also be distressed by (a changing parade of) strange adults.
In that circumstance it's better to let the helper do the generic tasks like cleaning and have the family do the specialist tasks.
But I think this taps into a very specific underlying "jealousy" issue (not talking about you here).
The theme I've noticed through many of these screaming matches debates is the disability adaptations that get questioned are the ones overlapping with perceived "desirable" general-use items.
You want an expensive trained carer to use and clean a child's feeding tube: fine.
You want a cleaner so you can sort out the tube yourself: not fine, cos I'd like one of those.
Your child gets boring therapy in a hospital from trained hcps using specialist equipment: fine.
Your child gets therapy through riding: not fine, cos I'd like that.
You get a wheelchair: fine.
You get a car: not fine.
You get an adapted special entrance round the back with the bins: fine.
You get a parking space near the front door: not fine.
The thing that's really startling is that the "desirable to the general public" items are often a lot cheaper than the specialist adaptations. So it's not about efficiency. It's about "I want one of those!"