I thought it was nonsense when I first heard it, but the traditional paper system is actually more secure than a completely digital system. Here is a really good video explaining it: https://youtu.be/w3_0x6oaDmI
Look, going to the bank is more secure. So why do we have banking apps? What if all your money is stolen?
Seriously, I find the knee jerk downvotes every time someone questions “just use paper” to be pretty ridiculous.