yt-dlp is amazing, but not everyone likes to use CLI tools (and, looking down the thread, not everyone prefers native packets as they may cause dependency issues and need extra tools for permissions control).
Even in a geeky Linux space, many people just want to push a button in a nice interface and get what they want. This app provides just that.
Abandon elitism, embrace variety. And use the tools you prefer - after all, plenty of Linux video/music downloaders have yt-dlp under the hood, and I use it on a regular.










Add that to the dangers of oligopolies. They can really just do whatever they want at this point.