Portability, RUFUS is windows only, most other tools require a lot more work to port. this one appears to be installable/usable on Win/Mac/Linux

Personally I'm a fan of ventoy[0] though it doesn't appear to be installable on mac, but if you set it up on linux/windows you can just drop any iso you want onto it from any system and it'll work like a charm.

[0] https://github.com/ventoy/Ventoy

I can't imagine electron is more compete than a wine wrapper around a native windows app. Qt or similar gui shouldn't be too much work for what appears to be a single window app.