My mum doesn't either. However
-3 years ago I was at a cash point machine, it retained my card at same time a random guy put his hand over mine and said 'keypad's not working'.
Obviously I immediately guessed it was a fraud but I was alone so what could I do? & I'd used a cashpoint on a busy main road in London.
I phoned bank and they said 'dont worry, the machine's retained your card they won't be able to use your card's. Yeah...as if. Thieves had drawn £200 + filled up with £50 petrol likely whilst I was still speaking to the bank.
Police came round and took a report, told me this crime is very common. Despite CCTV near cashpoint they didn't take it any further. They don't have the resources.
Twice, somebody has been able to set up a direct debit on my business account which isn't even in my name FFS its a company name. They can do this without my consent, signature and ID, when I couldn't even walk in a shop and get a phone contract without providing that.
I have the name of the company who set up the direct debit, as bank contacted me re bank charges for trying to withdraw a huge sum when I'd insufficient funds. Surprise surprise, when I looked up company online, no trace of them. & due to Data Protection, bank can't give ME details of who fraudulently set up the direct debit.
A lot of fraud is via internal systems. & they'll get away with it. Never mind sensible precautions...
If anyone wants to stay away from 'the machine' as much as possible I don't blame them.
Of course our details are everywhere so what can we do, but still online banking really isn't all it's cracked up to be
If your DM doesn't want to use it then leave best leave her alone on that one OP. Smart lady.