They don't at all! In fact, there have been successful NFT collections that handled payments via fiat for stable pricing and used a non-custodial OAuth wallet (

They don't at all! In fact, there have been successful NFT collections that handled payments via fiat for stable pricing and used a non-custodial OAuth wallet (eg a wallet that gets uniquely linked to your google/twitter/meta login, in a secure way) In that way, people could pay with card and obtain the NFT without ever having to deal with a crypto wallet or any cryptocurrency. But with the same distributed benefits that any other NFT has.