It's worth learning to harvest with a scythe because it's cheap, good exercise, and has no mechanical parts to fail.

The issue isn't whether it's worth learning something in a personal development sense, it's whether it's worth going into massive student loan debt to pursue a career path that was once seen as a ticket to a comfy office job. LLMs probably won't replace top performing software engineers. Will they replace the mediocre cog-in-the-machine coders that most people become? In 5 years? 10 years? 20 years? That's what has college students worrying about whether it's "worth it".