Sure but she will use the Spotify app or the Sotheby app to buy NFTs
Spotify and Sotheby on the other hand they will not even use a blockchain. Just like Coinbase doesn't use a blockchain
This whole decentralization mania solely work when people are are terribly scared of something: Government diluting their purchasing power via printing money and inflation.
That's a really deeply rooted thing in our brain as governments did that since the stone age. That's the only killer app of decentralization. As shown by the marketcap of king BTC and the success of exchanges like Coinbase and Binance.
NFTs, DeFi...all the other stuff...the user doesn't hate Spotify or Sotheby or the Google Store , but let's say for a moment that it does..well even if the ease of use and fees of DeFi were on par with legacy companies (they are not)...the consumer will always keep using the legacy company product and ask the government to tax them more. So they'd have the best of both worlds: a functioning product and a way to express their hatred