You don’t have to, this is just an option if you want your bills to be paid automatically. I posted step by step instructions on our help center if you choose this option!
For our upcoming updates, we are working to incorporate direct autopay into our Bills features, so that you will not have to go through this extra step. For now, you can also swipe to link to your Bills card to pay a Bill each time it is due (this is what I do, as I like to monitor my different bills). Additionally, if you give your billers your Envel debit card info, you can always pay your bills through your Cash envelope (which is linked to your card by default). Just make sure you have sufficient funds in your Cash, which you can do by turning off autopay or through manual transfers.
I hope this helps, and let us know if you have other questions!