I'm not sure this is true. It seems that places just want specialists. Im struggling to keep my current job because im inconsistent (fast as some things and slow at others) but I have a diverse working experience and im a genralist. If I need to find a new job, I'm most likely going to looking at low skill/requirement positions like a trash collector.
In the US, generalists are still high in demand. You might end up writing Wordpress plugins or some other unsexy tech, but there's work available for a decent salary.
Or if you are in the US and you're thinking about tech purely in terms of startup/vc/faaang terms, then you're more right, but wrt tech more broadly that's just not the case.
I'm in the US. The job market for tech seems terrible for my background and in the Philly region in general. There aren't even many unsexy jobs. Seems like most of the job postings are related to about a dozen big companies, and they are either saturated with applicants or they're just evergreen postings with little desire to actually hire someone.