Margaret, that's not entirely true.
Entitlement to DLA is assessed on a case by case basis. So someone with T1 MAY be entitled to that sort of benefit if - as Jacqui points out - the person for some reason has difficulties with mobility, dressing, continence etc.
Although a well-controlled T1 would not be eligible for DLA, someone who has developed complications and as a result needs care may be eligible.