I’ve met many people who offer this service in areas of high deprivation, they take money upfront and a percentage when the claim succeeds. These were not ethical individuals. Their clients were often vulnerable in various ways.
I agree, the forms seem designed to stop claims. A friend aged 78, sole carer for his wife, who was 80, blind, immobile, dementing, diabetic etc. he was refused any financial or practical support. Mr I was retired but had the knowledge from his working life. He helped our friend appeal, all necessary benefits were granted
Volunteers or paid welfare workers much less likely to be charlatans