Why doesn't universities inform presumptive students that biological systematics actually is a playhouse for fools?

When I entered biological systematics in university, I thought it was a stable science about living organisms. However, soon after I entered it, I discovered that it was not about living organisms at all, but about a paranoic sorting of types (ie, classes) into a "true tree of life". Why doesn't universities inform presumptive students that biological systematics actually is a playhouse for fools? (Bertrand Russell demonstrated that such a "true tree of life" is actually a paradox about a century ago. How on earth can this idea dominate biological systematics today?)