there don't seem to be practicing Jews in Star Trek's future, either. I wouldn't take the absence of gays too seriously.
Understandably non-heterosexual people are troubled by the absence of LGBT characters in Trek ... but last time I checked Trek has rarely played the identity politics game but rather tried to be universally progressive. Furthermore all this progressive stuff is usually implied via the background of Trek, not via foreground characters (if we exclude Uhura).
I don't know about that.
What about Chekov and his pride in his Russian heritage?
Picard and his French?
Sisko identifies as a Black man, O'Brien as Irish, Chakotay has his "Indian" beliefs, etc.
the Star Trek future for Humans doesn't seem to be a universal culture one for Humans.