I am still very early in this whole process, and there is still a lot of self doubt, so I am reading a lot of literature on "Am I trans" and dysphoria.
One concept that people often like to propose in these ressources is the button that makes you the opposite gender, and, crucially, also makes everyone else believe that you have been that way forever.
I don't really like this, because my time as a boy/man is part of who I am. I would not be me without it, and despite all of the problems I had and have due to my gender, it is still part of who I am. I fought through all of this and worked to find out who I want to be by myself. I wouldn't wanna be cis, and I also don't want to cease being the me born out of this struggle.
I think that question is more designed to cut through internalized transphobia. Our culture is still extremely transphobic, so I think it still has value. It doesn't really seem to apply to you, which is fine, but I also don't think anyone asking that question would hear your response of "well I want to be trans without erasing my own identity and past" and conclude that you are cis.