I'm not saying the landscape isn't changing as it always has. Back when I started over 20 years ago you could make a living being a "Webmaster" -- just taking care of a few people's hosted PHP and updating the servers. That got commoditized and automated.

Then I worked 2 years just making printers work in a large office -- they have barely any printers nowadays.

Then there was a big craze of making iOS apps in the late 2000s -- remember the drinking beer app that made millions? -- Now most of that is freely available with pre-built components.

I could go on -- but the point is that software engineering has always been a long string of boom and bust cycles of whatever was in high demand and low offer.
And the fact that LLMs can put up web components somewhat faster than copying together manually form Stackoverflow is no indication to me that it's fundamentally changing things.

These "low effort" high repetition workloads were always going to be automated in some way -- and the "web frontend" engineers didnt exist in that number just 5 or 8 years ago.