There's a world of difference between using a memory safe language and shipping a web browser with your app. I'm pretty sure Avalonia, JavaFX, and Wails would all be much leaner than electron.

The people who hate Electron hate JavaFX just as much if not more, and I'm not sure it would even use less memory. And while the build experience isn't awful, it's still a significant amount of work to package up in "executable" form especially for a platform different from what you're building on, or was until a couple of years ago. And I'm pretty sure Avalonia is even worse.