You are wrong,plenty of US sellers want it fast,as they have to pay their suppliers,meet rent,buy food,etc/
Thats why Paypal comes up with Bank issued debit card
Of course 'sellers' want it, what normal person wouldn't lol
if you are withdrawing from your Paypal account,say someone pays you with a cc,it takes time to collect that money,but we want our money NOW,so it is really an advance from PAYPAL