Why are Americans still dealing with checks in the age of digital banking?

I pay in checks for large bills. I fail to see a problem

Why would you use a functional system for the past fifty years that works? Instead of using a third party data harvesting middleman like Venmo/Cash app/Paypal who can reject your purchase because fuck you?

Wait, you guys don’t have bank transfers in the USA? I can send money from my own bank account with no fees to every other bank in my country