Because paper still needs to be used. I have customers that request paper invoices. I send them paper invoices so that I get paid. I have vendors that have no means of accepting payment other than by check. It is a lot easier to print out a complex troubleshooting or repair guide to use at a remote location than by trying to balance a tablet in some dark corner of a boat. The IRS still requires paper forms to be mailed to them. The local ferry system requires you to present a reservation sheet with its barcode and the ticket printed with its barcode. And the list goes on and on. My business is substantially digital, but paper is still required.
As an EMT I always wear gloves on scene. There are numerous apps which are good reference sources which get used on scene. If in fact the new iPhone 7 can't be turned on while wearing gloves, there is a huge number of first responders that most likely won't be upgrading to the new iPhone.
I program, therefore I am.