You haven't explained why it is irrational.

"Rational" implies order, logic, and purpose. "Irrational," then, implies chaos, illogic, and aimlessness.

We are rational beings, so to see our fellow man using his faculties in a well-ordered way in pursuit of some good is to see a man more fully alive.

It may not be my business to tell another person what to do, but it is right to admire certain types of activity over others.