I honestly don't worry about my T's comfort level. I've never felt hurt by him. We don't discuss goals though I'm certain he has them for my therapy and they for the most part match with mine. If I disagree with something he says, I tell him and we definitely have a couple things we have agreed to disagree about. We do have a healthy connection though. We like and respect each other as people. But I don't like the term "using" him. Such a negative term to me that feels manipulative and devoid of respect (that's MY response to the term and I realize it will feel different to other people) . But I see my T to work through my issues with great respect for his insights, his honesty, and his skills.

Is your idea immoral? No, I wouldn't think so. Not quite how I approach therapy, but if that is what you think you need and it actually works for you then I would guess it is fine. The question would be does that really work for you.