[desu_]

You are right that visiting the campus is a weak signal.

However, the decision came with a plethora of other decisions, some probably fair, some more reminiscent of the Asians-have-bad-personalities trick à la Harvard.

We're eliminating demonstrated interest as a consideration in our admission paradigm. We'll no longer encourage supplementary submission of materials, including resumes, research abstracts, writing samples, multimedia demonstrations of talents, and maker portfolios.

https://admission.enrollment.cmu.edu/pages/eliminating-demon...