I think it's the core product values for me.

JetBrains IDEs are development environments, meant for editing code, in specific primary language. They really try their best to understand code that user works on (which is a hard problem, because code is frequently invalid while it's being actively edited), and make it as convenient as possible.

VSCode is - in my understanding - essentially, a step over older glorified extensible notepads on steroids. Unlike those older extensible notepads, it does have built-in programming language editing features, but mostly it's still not the core product but rather a job for extensions and language servers to fill that niche.

So for me VSCode wins over editors like Sublime or Atom, that don't have core programming language processing concepts baked in, but still loses to the specialized IDEs where specific language support is a primary feature (like PyCharm or GoLand).