Yes. Even if it were doing important stuff, this "important stuff" shouldn't be affecting typing. We have multicore machines now, there's no excuse anymore.

Imagine if it were the opposite, and moving the mouse or speaking into a microphone caused the compilation to fail in subtle ways. Well, background compilation/typechecking/whatever is messing with user interaction.

I'm not naive, I've actually built IntelliJ plugins. I know engineers that work on the product, and I have an extremely good idea what it's doing under the hood. A lot of it is important to me and doesn't exist in VSCode, though that's also a great product for some languages.