If the specific UI style you mean is native SwiftUI / AppKit fonts, system icons, and UI components + a graphic designer girlfriend who helped with the rest, then sure. But that’s the way to do it particularly for a free open source project which needs to be very low maintenance. At the risk of being condescending: I AM an expert in this area (please see my work for DuckDuckGo or iOS work at SoundCloud pre-LLMs if you don’t believe me ;)).
It really just comes down to speed/cost of development. I’m with you in that I’m pretty anxious about what LLMs will do to us professional devs’ careers. But I have to say, this project would have taken 2-5 times as long if it hadn’t been for LLMs and might not have happened. It also helped me learn how to effectively utilise them after a period out of work where I felt I’d fallen behind in the advances in that area.
Ask me about any of the technical decisions / architecture / test strategy / CI pipeline and I will tell you in detail how it works without needing to ask Claude. But I suspect that might go over your head if you’re not a developer.