You're right. Academics and graduates are terrible for claiming universities teach critical thinking, yet never stating exactly what they mean or how they think they're doing that. Maybe an obscure philosophy class tries, but the vast majority of students don't take that and the claim is made about a college education in general, not philosophy classes specifically.

Seems to me like it's a self-defeating argument. If they were really teaching critical thinking as a skill, degree holders would immediately start arguing with them about this vague and poorly thought out claim, but in practice people just nod along.