Depends on the source. Many tutorials on Hackernoon or Medium or even personal sites are written by beginners trying to grow some web presence (if they are trying to make a career change) or just trying to edify their knowledge. It's great to learn something well by teaching another.

You end up in a blind leading the blind situation however and I find the most high quality tutorials end up being (usually) in the official documentation.

OTOH, lots of experienced devs forget the details that really get in the way! For example, I just learned I need to use an undocumented flag "disableOptimisticBPs" to enable breakpoints using Jest and Typescript with VSCode. I figured this out digging through Github issues. If I was to write a tutorial next week, there is a really high probability I'd forget this obscure step is what made my life easy.