I might trust someone enough to give them $20. I might not trust someone enough to enter my credit card details on their webpage.

That's why we have things like paypal and temporary virtual credit cards.

Many kinds of fraud attack the fallible human element, not technology. And blockchains cannot change that, as you can see with a glance at crypto news.

The technical solution to that is temporary CC numbers, not a giant crypto chain.

Sure, that's one technical solution, assuming you can get a card.

I was just trying to point out that trust is not binary.

Trust is a short-cut for the complexities the physical world presents. But in a purely digital world you can build things that doesn't NEED the short-cut. And that's a new capability. It let's you build things not possible before. DeFi exists because trustless transactions are possible. Not everything can and should be trustless, it's just a tool not a new society. But it's SUPER useful.

This is not a technical solution.

Growing up is also realizing that some problems require non-technical solutions :).

Sure, but it also makes it not an answer to the question which was asked.

And just because the technical solution to a technical problem might not be (/isn’t) a good/practical solution to the practical problem that the technical problem is inspired by, doesn’t make interest in the technical solution illegitimate.