Not the OP, and my advice is not specifically for a gender, but FWIW, I give similar advice: We don't know today how DNA data will be used in the future. 10 years from now, 20 years from now, this may be supremely normal, or we could be in massive dystopia of it used nefariously.

Sharing DNA with random startup private entities is not just a potential consequence for you, but also for anybody related to you, in the future, such as in particular your children.

And this is not theoretical for me - I explicitly do not want to be in this, I asked my immediate family to please consider the potential impact, and yet my dad enrolled and put my name in there. I now get to live with that decision.

(don't get me wrong, my dad and I are super close - but on this one thing, he, as most people, saw this as a lightweight decision with no consequence and some fun trivia, and did not share my perspective of it as a heavyweight, impactful decision with potentially long-lasting consequences)