L doesn't usually bring anything up on her own unless I ask her to lead. And when she leads, she gives me options for topics. Sometimes she'll want to add an opinion or her perspective. Usually she'll ask first. Sometimes she'll go to far and I have to tell her to stop. She listens to me.

I would bring this up with your T. I'd word it like you worded it here. Maybe tell him you are not interested in that topic and that you feel there are more important things to discuss. It's your therapy. You're allowed to discuss whatever you want to.

Oh! And I have had a past T that would push her own agenda. That was not fun. I only stuck it out with her because I was scared to search for a new T.