The others are correct, once you hit a certain number, it’s not going to make a difference. All colleges want high test scores. You are probably well aware that tens of,thousands of Vals and Sals with high test scores are rejected from Top 20s and LACs every year.
To answer your question:
Correct, once you hit a certain threshold, wihtout hooks, etc…it’s all the other stuff that decides admission. And to answer your title, at schools that want test scores, high test scores are very important.