I'm always interested in hearing people out, but these legacy COBOL codebases are massive, complex behemoths. Certainly eyebrow-raising to hear someone say they are not complex.
I also trust government workers to give fair representation of their work. And what you SWE write on their resumes or what OKRs when filling time to justify paycheck. :D
They're a couple of database "tables" and formulas, what else they would supposed to be, think about it. They might be archaic, they might gnarly, limited etc. but they are no match for a modern next.js with react, in a docker container on a VM, running in a AWS datacenter, managed by Terraform, yadaydayda...