Some people work cash in hand, so it’s more effort for them to go and put money in the bank.
I’m quite traditional in that I lift out my money once a month that I believe I’ll need and then pay for everything cash. i split it all up into envelopes for each type of spending eg food shopping, things the kids need that arise, fuel, gas, electric etc I find it helps me keep to my budgets if I’m handling actual cash whereas when I use my card I feel like I forgot I spent the money because it’s just typing in a pin and then I’m horrified when I check my balance and realise.
I don’t trust wireless because my card paid for someone else’s shopping in Tesco one day and the card was in my bag at the time! So I got the wireless function removed from my card as it scared me how sensitive it was.