But really thrilled for those that it works for, even if your tiny brain can't work out why it might be harder for others.
What a nasty comment 😡
I too had a parent with dementia, so fully understand the myriad challenges, which extend far beyond shopping.
It is of course reasonable to ask that the needs of as many as possible are accommodated - it includes people with conditions like your mum's, those with disabilities, or literacy issues - and also those who are on a tight budget, lone parents or trying to juggle competing financial demands.
When my dad was still alive, his form of dementia meant that, a previously highly numerate man, with a senior financial role, was unable to understand how money itself worked. Notes were a mystery to him. From an early stage in his diagnosis, he needed help from family or reliable shop assistants, just to pay for the paper. Should shops not take money, in that instance?
I fully empathise with the challenges. Those of us who find the discount system useful are not possessed of tiny minds, but the reality is that no system will serve everyone equally; of course as much assistance and adjustment should be available for those who need it; and welcoming the advantage of a system to me personally, doesn't mean that I am not aware it won't work for everyone.