Give me a break. Email is much more secure and convenient than getting it physical.
Many things still need to exist physically and be delivered physically.
Grocery store ads, billing notices don't need to be sent via snail mail. You can download magazines on a Kindle or even your smartphone.
Email is not secure unless you are using independent encryption.
There’s a lot more mail than just coupons and bills lol
As an example- I just got a new chip credit card in the mail the other day. I don’t think they could have emailed that.