Note taking is a deeply personal process. Physical notebooks as a medium are infinitely flexible but apps are not. This means that 100 different people writing notes on paper might be doing so in 100 different ways.
I’d argue that this is why this is such a crowded (or rich) product category.
I often find that <very popular “ultimate” note taking app> is not for me, and I find myself hoping for something that fits my particular needs and habits. I’ve occasionally thought about trying to build my own.
All of this to say: I don’t think the cynicism is needed here. Even if this is a solved problem for you, it’s not for all of us, and I think the evidence that this is true is found in the fact that developers keep looking for new ways to solve this problem.