Who would want to say "this item costs 0.0000000001 bitcoin" compared to "this costs a dollar"? No one.
So no, people do not want to deal with decimal points. They like dealing with whole numbers. I'd like to see someone go to a bank and request $0.00023 dollars. lol
This isn't the dollar, bub

And besides, they're completely different. $.00023 will never, ever, ever, ever, ever, be worth the dirt on your feet. A single Bitcoin encompasses tens, to hundreds of dollars. A fraction of a fraction of a Bitcoin is equal to a dollar.
People would call it something different if it came to that. You seem very sure of yourself for someone who shouldn't be. Besides, there's no way we'd whittle down to 1 BTC considering the last Bitcoin will be minted sometime after you're dead. Nobody's gonna lose all 21 million coins, I guarantee it.