Like you're saying, it's not that we're labeling ourselves, but that we're spreading awareness on multiple levels: LGBTQIA+ folks are sprinkled in our population. If someone goes their life without knowing any, or seeing any, they might feel alone and outcast.
I'm an Asexual male and I represent in my day to day with just a themed baseball hat.
Would you be more likely to visit a doctor who could confidently diagnose everything, or was willing to admit they aren't 100% sure? Most people want answers, and would change doctors if they don't get an answer, or an answer they want.