I know thats a lot of trans in one sentence but I caught myself doing this: I would see people call themselves trans (especially on the internet) that seemed cis as far I could tell: No HRT, no voice therapy or effort into sounding female, masculine or gender neutral clothes, no female mannorisms ... basically the only difference was one day they said they started calling themselves she instead of he. I always used to be resentful of these people thinking they were imposters or just confused. How could you possibly have transitioned without actually doing all the hard work? "I" know "I" am trans because I put lots of hard work and time into it: I'm on HRT spent many hours in therapy and group therapy, changed my mannerisms, always dress female and put lots of effort in make up and clothes endured the pain of laser hair removal while "you" on the other hand just decided one day everyone should call you she. Thats not fair "you" are an imposter!
But then I had a relization: I have a trans friend who is older and very feminine but other then a skirt she is male. She has just started her journey like me. I kept asking her: "when are you going to start HRT?" "Are you excited to start transitioning?" Then she said to me "I might not start HRT as I feel like since I have come out and started being honest with myself the dysphoria and everything else has gone away." I was very happy for her and understand why she doesn't want to start complicated medical procedures or even HRT as she is older and well passed the age of being able to get surgery safely.
But her age has nothing to do with it. She is no more or less trans, or female even, than me, in fact in many ways she is more female. I know with other things we don't like to see people who haven't gone through the time and effort to become something that we ourselves had to work hard for. But being trans is not about having estrogen, boobs, long hair or make up. It's about accepting who you are, going through the mental changes, and being honest and "out" with the world. Remember we were born trans and at some point we were all 100% male, doesn't matter if it took five years or 80 to get there.