The problem is usually in the company culture and hiring process.
Are the QA people & team treated like partners, first class citizens, and screened well the way you would an SWE?
Or are they treated like inferior replaceable cogs, resourced from a 3rd party consulting body shop with high turnover?
You get what you hire for.
Why would you upskill as a QA when you can become a dev? Every single QA person I know only became a QA as a stepping stone. That's now it's seen.
Companies don't care about QA, so of course you don't see any QA wizards anymore.
We hired a guy with an English Lit degree as QA. He was super smart, and really self-motivated. He learned full-stack dev, and wrote a fcking amazing dashboard and test config wizard in like half a year. (This was before AI)
People at that point were complaining about tests being hard to run for YEARS.
He then left for a dev role at another company in a short time.