I have a question about the Webb telescope. I know it will be positioned at L2 point (I even know what's that and why it is positioned there...), I just found out on its site that the telescope will orbit the L2 point. I'd like to say that I'm just a lay man who finds astronomy and astrophysics fascinating, but not much else, so please, be gentle..! why does it orbit the L2 instead of being positioned exactly where L2 is? my little understanding of the Lagrange points is that the gravities of the sun, earth and, I assume moon, cancel each other at those points, so what will keep the telescope in orbit around the point?

thank you