Whereas a C gig today probably means embedded, or subsystem far away from the frontend churn. If I'm lucky they have unit tests. The Lindy path you were talking about.
Many of us use it quietly, to do good work, and there is no need to crow to the world about what is happening under the hood.
Ex: Maintain some SQL queries, upgrade to a new database version without bricking everything, write some scripts that get fired off at a scheduled time, knowledge of the industry you're serving, update some configuration files for the company website which won't change for another decade, read some log files, create some visualization displays for operations staff, install software on certain machines, manage the company's VPN stuff, configure Linux, do the paperwork...etc
All this stuff is more generic IT and less rockstar developer. It reliably pays the bills and isn't very flashy.
There are plenty of people in IT that write code every day, some that rarely write code, and some that basically never write code, but just manage the business side of it all (there is a lot of beauracracy in large organizations).
Pretty sure you can get a job in frontend dev if you know React, which is 10 years old.
SPAs were an answer to cross platform and device issues, given the web browser was the best cross platform piece of software used by the largest population. It made sense to try that vs making native apps on all the different platforms.
The fundamental problem in the web space spawning all of these tools has always been JavaScript’s weaknesses though.