Because nobody understands everything, but our individual areas of expertise vary from person to person. So you seek help on the things that confuse you.
There have been some helpful people in this thread. You’re not one of them. Instead you’re displaying the same attributes that take the most open and free operating system, and give it the reputation as being closed gated.
It would be like a mechanic rolling his eyes at you for not knowing how to replace a muffler, or change your own oil.
I’ve been trying to understand linux that way for 10 years. The problem is the tutorials will say “do this and this, and this, and this”. I’ll get maybe 30% through the tutorial, and get an error. But the tutorial didn’t account for an error. So I google the error, and find 10 different pages all telling me to do 10 different things.
But in doing 7 of those things, I screw 3 more things up because I don’t know what those things did. Or I did them wrong. And now I have 8 problems instead of 1.
Sometimes you just need a human teacher who knows what they’re doing. It’s like learning to cook, but not having taste buds. You can be told to add salt, but if you don’t know what salt does, or why you’re adding it, you might add too much, or not enough, or at the wrong time. But if a human teacher can explain what you’re doing, and what it does, and why it does that, THEN you might learn.