That's a very superficial vision of religion. Maybe it's not more than that for you, but for a lot of people it is way more than just something they decided to follow arbitraly. You should educate yourself before saying something like that.
And, in fact, homosexual practice is an option. There are people who have a natural tendency towards gambling, alcoholism, etc. Many of them do not give in to their addiction, or at least try not to.
Anyway, the armband is a very bad idea, which seem made to cause this kind of embarrassment, in a league that receive players from all the cultures, including muslims countries. I do not think PL has to stop defending whatever they believe because of foreigners, but it's unnecessary to force individuals to wear that.