My OH would do this, he only buys branded products, he is almost certainly on the spectrum and has ADHD, not diagnosed, wont be tested but I work in this area with a high level in my client group and have been to lots of assessments with the servce users so am almost certain
So he has two problems, firstly he cant remember and doesnt know how to find good value, its meaningless to him, he will see a stand with 'offers' on them and think its a good offer even though end of aisle offers are nearly always brands and always cost more than the stores own make
Secondly, he cant look properly at things, if you notice in supermarkets the most expensive products and brands are at eye level, your heinz beans are at eye level, your tesco own are right down the bottom, he is not capable of looking around the shelves to see different things, he only sees what is in front of him
He also thinks that the 'offer' stands are where that product is, so if he goes for coffee and the stand in front of him at the end of the aisle has coffee on it, he thinks he is at the 'coffee section' and there it is in front of him, he wont think to go to the hot drinks section and find all the coffees there
We have quite a lot of 'disputes' about shopping, I cant bear it as I cant bear the thought of being swindled and thats what supermarkets do to you.
Supermarkets dont make money on their own brand, they make money on brands.