Boy, it's really hard to know what to make of this. She asked you to consider not using the nightlight, which is different than telling you that you shouldn't or that it's not good for you.

My therapist would never tell me to do anything, but she has asked me to consider trying something out and paying attention to how that makes me feel when I do whatever it is. That doesn't mean she's ignoring the root cause at all, just trying to help me figure things out for myself. I have no way of knowing your therapist's motivations for her suggestions, but it sounds like you have a good enough relationship to ask her.