Quite the opposite. Valence is very interested in the user’s library. However, Daily Mixes and Roon Radio are explicitly designed to leave your library. We use your library/history to find a good selection of music you may have missed or that you should be listening to. It’s not a smart shuffle. It’s meant to be a gentle way to expand the scope of your listening habits.
If you want to shuffle, there are ways to focus down to some subset of your library and just shuffle.