how is it not a stricter sector?
Because it is a difficult stressful job that in many cases has low job satisfication.
It's all very well if you are caring for a nice little old lady who just has mobility issues and is polite and grateful. It's another thing if you have having to clean up piss and shit of a violent cantankerous old man with vascular dementia. Far more caring jobs are closer to the latter than the former.
Add to that low pay and in the case of employees of caring companies -the companies creaming off the better part of £40 an hour for themselves and paying the employee minimum or near minimum wage - all adds up to a massively understaffed sector.
Good carers are ones that are qualified, trained, kind, patient and care about their job and their client - they tend to be people choosing it as a life long career choice. Lots of people in the sector are literally only doing it as a stop gap to make some money, don't care and are pefunctory and abrupt and really don't care.
Staffing levels mean they can't be stricter and in a lot of cases the 'strictness' really relates to personality issues rather than base level competence.
Don't forget also that many people who engage carers or care homes for the relatives who need them - themselves don't actually give a shit either. They just want problematic dad/mum/aunty/uncle dealt with - sadly. So they don't police or demand higher standards. Not everyone but some.