I think the point is that it's better to have something using the native widgets of your OS if possible. It carries much less footprint and it integrates with your OS much more nicely in the end. Webapps running in Electron is just becoming too commonplace.
Qt also isn't truly native (it renders its own UI components) and shares many of Electron's drawbacks, so it's only marginally better (and means you have to learn an entirely new platform if you're already familiar with web dev).
I didn't say it's impossible (I've also done it), but for something that's not a full-time job/project, it's a lot of extra work that could be avoided by simply using Electron, especially if you are already familiar with web development but don't have any experience with any of the native platforms.
You're right, I missed the OP saying that. But I still disagree: prior experience with a platform is a great reason for using it. Maybe not for a company with lots of resources, like Slack or Microsoft, but definitely for a small team or individual developer. Any time you would have spent learning a new development platform can instead be spent building new features!