Thank you for email and enquiry.
This is a standard behaviour from WooCommerce. Even if you choose Payment by Check and hit the Order button, it will still ask the customer to fill out the form so that you can process the payment. Otherwise, you will not know who your customer is and to which address you would need to ship.
If your issue is a little more specific, we can have another look for you in detail. For this we ask you to contact our support team under the following email address: email@example.com