How do you 'undo' an entire market founded on fixing mistakes that shouldn't have been made once it gets established? Like the US tax system doesn't get some simple problems fixed because there are entire industries reliant upon them not getting fixed. I'm not sure encouraging outsiders to make a business model around patching over things that shouldn't be happening in the first place is the optimal way to solve the issues in the long term.
This is the fantasy of brownfield redevelopment. The reality is that remediation is always expensive even when it doesn’t depend on novel innovations.