I see a lot of confusion in the comments of that thread, so it is not just me.
Do we have a problem in tech that we don't present knowledge in simple way enough for 'normal' people to understand? Is that why we have a lot of intermediate programmers and a few advanced ones?
Just keep reading and pick up what you can, and remember that just because you don't know how or why it works doesn't mean you can't make it work for you.
Eg: How many Uber drivers know how to fix a car? or How many social media stars know how to render a video, let alone what protocol is being used in the back end of the virtual server hosting it.
Back in the 70s and 80s computers were far less complex than they are now but only "smart" people knew how to use them....how did that work out for 99.9% of them?
Don't put too much value in the fact that these things are complicated right now as eventually they will get more complicated but easier to use, thus allowing the majority of non geniuses to take full advantage of the tech.
AI and ML are just two of the high tech subjects the average person won't understand how they work. They are too complex to teach without the linear algebra required for the course.
If you think it's bad to have to read something like that, imagine being a programmer who might have to take orders from someone who couldn't read something like that.
See