>Modern frontend development provides many opportunities for failure
I think this is the important thing here. Everything feels less stable, and more prone to breaking, on the modern web. You write some simple HTML, style it with CSS, and write vanilla JS for the parts that need it, and everything feels solid. You start a new project with a framework, and it seems like there is this whole area of your project that is essentially a black box, ready to break (or misbehave) any time.
I think this is the important thing here. Everything feels less stable, and more prone to breaking, on the modern web. You write some simple HTML, style it with CSS, and write vanilla JS for the parts that need it, and everything feels solid. You start a new project with a framework, and it seems like there is this whole area of your project that is essentially a black box, ready to break (or misbehave) any time.