In the government-controlled fiat system, you are right. In Monero, you are wrong.
Through a giftcard, yes. I have been eating Monero since January of 2023
Your supermarket accepts payments in cash, which is better anyway.
(I say as someone who pays for certain services in Monero)
Ive spent years buying groceries with crypto. Just buy their gift cards with it
Best options by far for financial privacy are cash and Monero.
How can you buy things with monero? What merchants (online or in person) accept it?
More and more merchants are beginning to accept it directly and you can check out the Monerica directory, XMRBazaar or Monero Market to find them. If you cannot find what you need directly for monero then you can get thousands of merchant gift cards from Coinsbee, Coin Cards, or Cake Pay.
Check Monero to gift cards websites there's a lot of there. Spotify, amazon, Walmart...
You could maybe use the service AnonShop as mentioned in the Closed NTWRK podcast
No. Your best bet is with something like privacy.com or mysudo.
Edit: grammar
The whole point is that everything is in an official ledger, that can be argued over in front of a judge.
Best you can do is say you don’t consent for your data to be sold. Find a smaller bank or a credit union where they have to give a shit about their customers.