Same reason people use Electron for desktop apps. It's just more efficient in development time. And development resources are usually the most expensive part of development.
That's the "somebody else's problem" approach to determining requirements. Performance matters for the end user. They just might not be able to articulate it just like that.
And no one flew to the moon in a fighter jet. You only use the tool that can actually do the job. OP's point was that Python usually does the job, and using Rust out of the gate might be premature optimization I believe.
