DNSSEC also solves a bunch of real world threat models that do cause massive security issues. I think we should put that effort into DNS as well.
Does it?
I run a bunch of websites personally. I have ACME-issued TLS certificates from LetsEncrypt. I monitor the Certificate Transparency logs, and have CAA records set.
What's the threat model that should worry me, where DNSSEC is the right improvement?
Somehow they cause these massive security issues without impacting the 95%+ of sites that haven't used the protocol since it became viable to adopt a decade and a half ago.
It's just a very difficult statistic to get around! Whenever you make a claim like this, you're going to have address the fact that basically ~every high-security organization on the Internet has chosen not to adopt the protocol, and there are basically zero stories about how this has bit any of them.