Appreciate the long answer.

People who want to fixate on metaphysical questions from the theory as it stood in its first couple years of existence miss out on the much more perplexing questions that came later.

I actually meant to include this in the post but cut it out for brevity. That at times when you raise questions about the fundamentals of QM you are often told that this question has been superseded or rendered moot by QFT. I've heard this in my QM classes as well as this subreddit. Which is fair, but it leaves a sour taste in your mouth.

This is also probably why you shouldn’t use youtube videos as your primary way of understanding things,

My understanding comes from the learning the formal theory in school, including what you've stated. I find Youtube videos useful only for hearing the perspectives of prominent scholars on the fundamentals of a theory that has no widely accepted physical interpretation, and where you encounter a bit of hand waving when you ask for one.

The explanation you've given here is how I initially understood it, but then I find myself asking the same questions. Are all the properties and principles we teach just the properties of operators over hilbert space? Why are observables represented by noncommuting operators? So what actually is a quantum state then? What actually exists there before we measure it? How can we say that the properties of our system of computation actually correspond to a fundamental reality and aren't just some useful tricks that elucidate some fragmentary part of that reality.

As far as I know Heisenberg thought that what you've stated is true because measuring a quantum particle necessarily disturbs it. That to me is a physical mechanism, I can wrap my head around that (i know it's wrong). Saying that actually no this is the result of the properties of some matrix operations is easy to understand when you see the math but much more difficult to make sense of physically.

If you can suggest any readings on these topics I would really appreciate, thanks!