> One nice property of money is that you don't need to have read extensively about money for someone to give you money.
This is true of cash, but not true of debit cards. It is actually quite rate for ordinary people to be able to accept a debit card payment, but that doesn't make debit cards not useful.
I'm not sure I see it function as a tool for increasing adoption, though.
Anyone can send someone Bitcoin by asking them to install a wallet (or giving them a paper wallet).
The story seems less simple if those were sent with Lightning. Maybe that's just a question of wallet support not being pervasive.
One nice property of money is that you don't need to have read extensively about money for someone to give you money.