Definitely not trying to start a fight and I appreciate your perspective. As you say, it's
already hard for openly queer actors to get roles as straight characters, and there are still many actors/entertainers endlessly speculated on this site as being in the closet, glass or not, in order to preserve their ability to get work.
I applaud Heartstopper for fearlessly pursuing representation in their cast, my only concern is that openly calling for casting to match character will give license to the loudest and nastiest voices on the other side to call for all straight characters to be played by straight actors and make it
even harder for queer actors to play straight characters, while having no effect on the ability of cishet actors to get queer roles. And that's not the fault of anyone who worked on Heartstopper, it's just a general concern about the relationship between the LGBTQ community and the entertainment industry.
I know trying to have a serious conversation on this site is generally a fruitless effort but I genuinely appreciate your contribution