Re: There are no words...
I didn't downvote you but I can imagine the downvotes are similar for the others that have been similarly downvoted. You felt so "indifferent" you went to the effort to read and then comment on the story, telling everyone that you don't care. I think you are right that one man's sexuality shouldn't be important but I don't think you quite get the point of the story.
I'll try to explain here:-
I'm pretty sure Tim Cook isn't directing this 'news' to you or in fact most of the people who would be reading El Reg - I'm guessing the readership is western and generally culturally liberal and we don't care about sexuality. However there are many people who do care about this and more importantly, care enough to create, encourage, enforce laws and social customs to oppress, outlaw and even eliminate 'being gay', even in the US.
Furthermore, there are many old social stigmas surrounding homosexuality that remain, such as gay people aren't strong enough or the 'right sort of people' to be CEOs or sportspeople - clearly this story is at least evidence against such ideas.
Look at it another way - society still expects people to be heterosexual and then those who aren't have to realise that they are not and then readjust 'out', both themselves and others around them. You may (or may not) have gay friends who will recount the time they realised who they were and how they came out. For some, it wasn't that difficult, for others it can be a painfull process - losing jobs, friends and even family as many simply do not accept the fact.
Therefore, for Apple's CEO to stand up and simply tell the world 'yes I'm gay and not unhappy about that', does help to drive the gradual social acceptance of homosexuality and create the role models that, as you point out, shouldn't actually be neccessary.
For an example of why this is still unfortunately news, compare the coming out of former NBA basketball player John Amechi, he had to hide his sexuality for his entire playing career, note for a period he played at Utah (and their CEO was vocally not accepting of homosexuality). When he did come out, in his book after retirement, there was a reaction from other players that suggested many do care The reaction
In summary, it shouldn't be news, but it is because there are many who do care about this, even though they shouldn't and this hopefully starts to erode their interest.