Yup, can understand if your library is small, but for bigger libraries that's definitely the most inconvenient thing you can do.
Speaking from experience because I was basically forced to do it that way when I didn't have regular internet access yet. My library was longer than 50 days. Just Hip-Hop alone was above 100GB.
I used to find a shitton of music that way, but the inconvenience was real. Worst was music that I had to tag myself for example. Love mp3tag but that's shit.