This seems to be a never-ending story. There are companies out there doing system design interviews to candidates with 3 years old experience and that's mostly the target of ByteByteGo. I may say, desperate people trying to digest the most they can in the less time to increase the chances of getting a job. Same as people grinding LeetCode in record time to nail a job.
BBG content is good if you want to learn about use cases and how things work if you're already in position of taking responsibilities for the implementation of technologies like those, or you have a say in your team/project. If you're never gonna work with them, then it's just reading for nothing, you'll end up forgetting those things exist.
I personally am pretty fine with using Ishkur's guide on my own, searching by myself what I like and filtering out what I don't like, and knowing what's what I don't like and why. I've been going back to it for the last 3 years and I'm not even half the road, yet.
I hope whenever you need a service from any other company for your own company to keep working (hosting, mailing, analytics, etc) they respond you with "We will inform you within 2-weeks if we are interested in learning more about you".
You should understand that by hiring people you're not making anybody a favor (it's a contract between both parties, both benefit).
