Mail services are, in my opinion, a worthwhile endeavour. People in remote parts of the country deserve to be able to get their bills on paper too.
It’s when they’re considered to be a standalone, for-profit corporation that problems really crop up. Especially when they’re competing with and for Amazon’s race to the bottom delivery rates.
I say this as someone who resolutely avoids electronic billing. It’s a FANTASTIC way for my ADHD brain to forget about bills until the power is cut off.
ETA Germany sold off Deutsche Post but that’s a terrible example because Germany doesn’t have 90% of its population on 10% of the land mass and still need to serve that 10% population.