Apple Credit Card

I am a big user of Apple Products. A few months back, I applied and received an Apple Credit Card. I was impressed with All the incentives and benefits of using the card to put All my monthly charges on. Until, it was time to make a payment. The ONLY option is to give up Bank Account and routing numbers, which I am NOT comfortable with. So I have made payments through my Bank like I pay ALL of my bills with electronic check. But, Apple does NOT except electronic checks, so the bank them a check in the mail. The first Payment took 15 Days to get credited to my account. Now I am at 9 Days and still No credit to my account. Why is it that a Very Large electronic company like Apple, and Very Large Bank like Goldman Sacs, can take money electronically Out of my Bank Account. But do Not except a electronic check into their Bank? My Only avenue at this point is to STOP ALL use of my Apple Card. And that is SAD !!!!