I guess it depends on how much time you spend on an app. I've been working on my PyQt app [1] for 2331 hours (I track my time). $500 is nothing in comparison.
[1]: https://fman.io
[1]: https://fman.io
On one hand you have the complex licensing thing (PyQt) where you are limited to desktop of Mac, Win, Linux. On the other you have a skill (JS dev) that is good for literally any screen, on any platform with almost zero complications for commercial apps. It is a no brainer.
If it isn't obvious, I have begun the transition to embrace JS for what it is... I am learning it and it hasn't been too bad. Python will be relegated to ML/AI and glue...
Regarding licensing, you can simply buy the commercial license only when you go public / begin making money. It's not that difficult I think.
But as I said, you are correct in that Electron is easier to use for many people. I'm also the last person to say you should always use PyQt. Just today I recommended someone to use Electron over PyQt. It really depends on the project.