I would not say that about a framework like Django - though I would encourage people not to under-invest in understanding web fundamentals since once you have those Django, Rails, Next.js etc are all quick to pick up.
I would say that about LLMs.
That's why I'm ringing the alarm bells here. LLM skills are not the same as framework or library usage skills. They aren't clearly documented or predictable - they're really weird!
If you assume learning to use coding agents is the same category of challenge as learning to use something like Django you'll get burned by that assumption.
But what makes it impossible to catch up? Does it matter if I wait a year and then start? It's not a linear thing, at some point I will catch up with those that started before me, as the logarithmic curve of learning flattens out. And then, why does it matter that I started a year later?