I think here the word Hook is bettr than flaw.
When I introduced my students to Ars Magica, I was at pains to say (explicitly for this example) that Flaws are messages to the GM to say "I would like stories about this aspect", and it was perfectly possible to play a character who is non-binary/pagan/jewish/etc without taking the corresponding flaw if you didn't want to have stories about it.
Bob