justify taliyahs waveclear and roaming

Or because you are lv27, and taliyah is a very high-skill-requirement champion that nearly nobody at your level (and for that matter in bronze/silver) can figure out how to play. For the same reason you have probably never/rarely seen azir, viktor or leblanc, despite how good they are.

If you look at some statistic sites or pro games, the champs/winrates being used by plat+ players are very different from those of new or casual players, with gold and some rare silver players sort of in the middle.