I imagine that the music scraping for AI was accomplished using files freely available on the Internet. Many of those files are 256kbps at best and most are 128kbps. GIGO… garbage in garbage out… when all of the samples are of low quality, the output necessarily will contain the artifacts of 128kbps files, too.

I like Lofi music but I also realize that it is most likely created by AI these days. There is a similarity to the pieces and all of the creators seem to use aliases. Perfect canvas for AI production.