Those people moved to content websites like YouTube and Udemy where they can cash in on what they do. They don't make websites any more, so Google doesn't find links to them.
Google indexes and returns links to YouTube videos for queries now and will even point you to the relevant part if the video uses chapters.
STRONGLY disagree. Wordpress is plenty professional looking and modern, and makes it dead simple to find a hosting service, create a site, choose a theme, and start writing content.
I can take a video with my phone and upload it to YouTube from my phone. My phone camera can work surprisingly well in poor lighting conditions. I can spend < $100 dollars and get a couple of cheap ring lights and improve the lighting massively. If I wanted to make a spoof news show, I'd just need OBS and a good webcam or a cheap DSLR now. Way easier than in 2002 where I'd need a Video Toaster and tens if not hundreds of thousands of dollars in equipment.
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People passionate about sharing and learning will always be driven to produce quality content, even if they don't have an audience. The issue is that Google will never discover these people because they're only interested in discovering the best marketers on the internet.