Really? Maybe it depends on the specialty, because every single company I know that works with Drupal has more work than they can handle and is hiring developers.
This mentality is a little bit crazymaking (but it may just be that I'm crazy). It's always bad for someone out there. The market is not great for SPARC assembly programmers, or for Turbo Pascal programmers, or for Motif UX specialists.
I don't believe the market actually is bad for people with a modern systems programming skillset (not least because we have trouble hiring those people), but I don't doubt that there are systems jobs that used to be common that no longer are.
Nobody has a license not to adapt. If you're stuck in a crappy job working overtime solely because you're stuck maintaining AIX database applications, it's hard to blame the structure of the job market on that. Get thee to Github.