Parents of children that don't have disabilities have no idea of the amount of work and stress and additional duties that goes into caring for a disabled child.
Toileting- most children are toilet trained by three. Some never are and require 'changing their whole lives'.
Feeding- some children never learn to feed themselves, every meal, every day.
Safety, some children require watching during all waking hours- their whole lives!
Sleep- some children require minimal sleep say 3/4/5 hours a night. There are medications thst can be given but not always and they don't always work. Some require turning regularly.
Therapies: physio, speech and occupational- every day, do many times per day for so long etc.
School- some children are do complex they can't have their needs met in school so they have to stay at home/ with their parents. This doesn't change when they become an adult. Some schools take children and can't cope, calling the parent to collect early most days or exclude.
Appointments- imagine dietitian, speech, ot, pt, school, doctors, hospital, social...... how are these to be managed while working? Not many employers are so understanding.
Paperwork- ehcp's, tribunals, pre-action letters, judicial reviews, annual reviews, dla, pip, blue badge applications, assessments etc
Fighting- for all of the above plus others not mentioned.
Parents of disabled children have a completely different experience to that of 'normal' children. So yes carers, which is why even the government pay carers allowance (a pittance and nowhere near that should be given).
Be grateful you don't understand this.