I feel that this attitude has a problem, a double edge to the sword of the criticism. And thats that it basically supports forced outing of closeted public figures.
Its similar to the "queer roles go to queer actors" rhetoric (though I think unlike your criticisms of F1nn, that idea is just straight up wrong because of the forced outing issue), or the stuff discussed in Sarah Z'd video about queerbaiting accusations towards celebrities.
In this case, I think the side of the sword your criticism is on is sharper. I do completly disagree with the people saying he has a responsability to disclose HRT immediatly though, for this reason.