For example, many (not all) men in the NE, historically, had manual jobs, which did not involve using telephone, computer, etc etc.
That is a big part of it.
Many miners and shipyard workers had the good sense to realise they were not cut out to deal with figures, bills, contracts and so on.
A friend of mine, who has a skilled office job but still lets his wife deal with finances, told me an amusing story.
His wife asked him to go to the corner shop to buy cigarettes and a loaf of bread, paying with a winning lottery ticket.
He got to the shop and was surprised to discover the win was about £90, rather than the £10 he was expecting.
As he told me, he had an agonising walk home, wondering whether he could get away with giving his wife the change from £10, thereby clicking about £80 beer money.
Honesty won the day, and suffice to say, his wife did think the ticket was a £10 win.
My mate described himself as gutted.