I'm a little late, but yeah. Some kicks are more important/useful than others, mind you. A good front kick can feel like getting jabbed with a spear or something, as it's got just as much or more power than a punch, and about 50% more reach than a straight punch. A good roundhouse kick is like getting blasted with a baseball bat. Then you get into things like crescent kicks or axe kicks, where the risk to reward ratio starts to drop drastically (in MMA/street).
Jardine pillaged Liddell with kicks to the body and (I think?) legs. I think that's another good example of the viability of kicks.
Not to be offensive to you or your teacher, but it could just be that you're a better takedown artist than your teacher is a kicker.