For longer sessions that's not a problem, but when you're on battery or quickly hopping into the project to look something up it makes a lot of difference. Also, opening up a foreign project is two clicks and one second, compared to project creation and then loading+indexing when using IntelliJ.
I love the IntelliJ line of IDEs. But VSCode outcompetes it in simplicity by far. Especially when we're talking about something like a simple Node project, where compilation+execution is far simpler than something with a full build pipeline with artefacts.