Do business accept Venmo (I know some do, though it seems Venmo is backed by a pre-paid card)? Can you pay your rent with it, for example? Tuition? Buy a car with it?
The payment methods I mentioned don't require people to install an app or enter an agreement, you have a bank account they're available to you. Sure, there's some typing of numbers (but that's pretty much a copy-paste today). Not to mention the privacy issues with Venmo.
These payment apps tend to work like another bank account in practice.
People use P2P apps when they want to casually send money to people they know. For merchants they get the square app and process credit cards directly. Venmo & friends tend not to be good for actual business for large transactions due to how bad chargebacks can be on it, so for large transactions you can use ACH which tends to be $0.25 for pretty much any money value, or free in many cases.