Why are so many self-taught people so impatient

Although I am self-taught in piano, I have always had a question.

It is that now a lot of content from people teaching themselves piano is recommended to me, all comparing things like being able to play a very complicated piece in one month.

But this kind of forcing the practice, the general usefulness is very poor, right?

The chord basics are basically completely absent, once the tonic chord changes, don't they have to redo the muscle memory?

And in this situation it is not reading the score at all but muscle memory, right?

Once they get a new score, don't they have to count there again?

On top of that it really sounds very noisy, all the notes are pressed with full force, the fingers also look very awkward, there is completely no technique to speak of

Is this really good?

I have always felt that playing piano is a long-term interest, starting with 30 minutes, practicing every day, then gradually being able to do 2-3 hours a day, constantly moving forward every day, requiring myself to be able to do something at the next stage.

Later on, basically being able to play when seeing the score, not having to keep looking at the fingers, while also being able to read the score structurally, roughly knowing what chord it is when seeing the structure, and then playing it easily.

After practicing the pedal and the main melody and so on accurately, it sounds very good.

Why are so many self-taught people so impatient.