why does anyone prefer to withdraw usd? I think withdraw btc is better, low fee and fast.
certainly you can do that. but eventually you have to transfer btc into usd for shopping or business, not so much people like our imagination in this world who support Bitcoins. so anyway, you can only use the dollar finally, why would you pay a extra withdrawals fee?
not everyone has the idea like you, some people is more willing to hold btc rather usd