It's like saying doctors and medicine are desirable once a medical condition arises. But sometimes, preventative medicine and eating right in the first place is better.

An once of prevention is better than a pound of cure.

Web3 can prevent a whole class of problems that normally would require after-the-fact arbitration to fix. It's better to just have existing systems. Like for example having red lights at intersections, where everyone knows when it's their turn to move.

You understand that software can automate things. That's good. Now you have to understand that web3 is nothing but software which is decentralized and byzantine fault tolerant, so you can trust that the code is being executed correctly. This is the massive improvement over code that runs inside some server farm and can be switched up anytime.

It's weird arguing that no, we would rather have databases where certain people have the key to subtly corrupt the entire database, and then we can catch them and try to recover from this corruption using litigation. That's what MtGox was.