No, you weren't clear, nor are you correct: you shared FUD about something it seems you have not tried, because testing your claims with a recent agentic system would dispel them.
I've had great success teaching Claude Code use DSLs I've created in my research. Trivially, it has never seen exactly these DSLs before -- yet it has correctly created complex programs using those DSLs, and indeed -- they work!
Have you had frontier agents work on programs in "esoteric" (unpopular) languages (pick: Zig, Haskell, Lisp, Elixir, etc)?
I don't see clarity, and I'm not sure if you've tried any of your claims for real.
