I’m sure that more than a few will identify themselves with your theory.
However, a few things to consider.
A) for many of us, crossdressing started way before puberty, so hormonal levels would have played a minimal role, if any.
B) for way too many, crossdressing is tied up to sexual arousal and drive which both males and females is related to higher levels of T. (Adding more T to the mix would likely be like pouring gas on fire)
C) somebody mentioned already. It isn’t that there is no drive to CD in the late 20’s-early 30’s (at the peak of the T levels for most men). But factors like the lack of self-acceptance, more limited amounts of cash (earlier in our careers, more family expenses) and lack of available personal time seriously impede the “development” of this aspect of our personalities. By 50, kids are either at college or moved out already, we tend to have better jobs, more free time, etc.
Anyway, more T? Not for me, thanks!! 😉