Earlier quoted context omitted.
If they paid well enough, your average working programmer would flip to COBOL for a pay raise. Once you've learned a few languages, you can solve problems in any language. It's just about having the manual and maybe an overview of available facilities so you don't have to read all the docs upfront. The syntax doesn't matter for data plumbing applications. COBOL is as good as BASIC as good as Java as good as Python et…
It’s not the language but the ecosystem that’s a barrier to entry. Do you have a z series in your garage to hack around with?
You just need a Linux PC with the IBM Z Development & Test Environment.
(Of course, ZD&T, even the “Personal Edition”, doesn’t exactly have hobbyist-friendly pricing.[0])
You can do cheaper (i.e., free) with Hercules, but only with older OS’s.
[0] https://www.ibm.com/products/z-development-test-environment/...