Telling is such a powerful word. I mean, that becomes a command. Unless we are under that chain of command, then no, I do not agree that teachers should tell us what to do outside class. Not just Aikido, any class, any teachers.
However, what they could do is give advice on how to run our lives. It is up to us to accept it or not. I myself have taken good advice in Aikido class and try to apply it to everyday life.
It's Aikido in daily life. Not just that, I try to apply Ki in daily life also.