The hypothetical business has two choices. Choose Electron, or choose some other toolkit that has native, cross-platform support (like Qt). It's far easier for the business, and the developers there, to take their existing website HTML, CSS, and Javascript; and simply wrap it in Electron (which costs $0), and call it a day. Every other choice is (perceived as being) more expensive.
Qt is a modern toolkit with native-cross platform support, but costs money for commercial use, and businesses and software developers don't want to spend the money on it.
The hypothetical business has two choices. Choose Electron, or choose some other toolkit that has native, cross-platform support (like Qt). It's far easier for the business, and the developers there, to take their existing website HTML, CSS, and Javascript; and simply wrap it in Electron (which costs $0), and call it a day. Every other choice is (perceived as being) more expensive.
Qt is a modern toolkit with native-cross platform support, but costs money for commercial use, and businesses and software developers don't want to spend the money on it.