Earlier quoted context omitted.
It’s not mind boggling at all. It’s controlled by one entity that is not optimizing for good search, but rather its own financial gain.
What's the entity in question for KDE search?
You have to turn the file indexer on or install it if you don't have it. Try `baloo status` or `baloo6 status`. Poke around in setting too so you can index what you need and not temp files.