If dutasteride triggered gyno for you then absolutely you don't need it, your systemic estrogen is doing well enough.
I -still- have zero f'n signs of gyno and I've been rocking the estrogel for a bit now, my stomach isn't lean anymore but I don't really give a sh*t about that.
I've always been able to tolerate higher levels of estrogen without gyno, it's all relative, as I say, some men are androgen insensitive, and thus they cannot get "enough" out of the effects of testosterone and often those men age poorly unless they take TRT or steroids.
Typically androgen insensitive men have a higher likelihood of not having serious hair sensitivities to test or DHT either. If you're androgen sensitive, well think about it this way, you may have to have a hormonal profile that favors estrogen, but the simple fact of the matter is, if your body gets more out of testosterone, then what difference does it make?
I've been having to use quite a deal of estrogel on my scalp already, and I'm not really seeing the exceptionally negative sides of using it, but it has absolutely helped out my skin and scalp.