He knows not his own strength who hath not met adversity.
And, of course, some SF is set close enough to here and now that Anglo and European do apply. Since many of the writers come from those backgrounds, so does much of the fiction.
Don't mistake a good setup for a satisfying conclusion - many beginning writers end their stories when the real story is just ready to begin.
Resist the temptation to try to use dazzling style to conceal weakness of substance.
It's most presumptuous to believe we already know all the answers and will never get any more big surprises.
Of course, the way writers think about those things is almost certain to be affected by their own cultural background, and it would be hard to deny that, for whatever reasons, a lot of SF writers come from Anglo or European backgrounds.
As for sticking strictly to presently known science, I will simply point out that we have already experienced at least two major revolutions in science in this century alone.
I want to enjoy myself and enjoy the challenge. I love to compete at the top level of NASCAR. I love my job. I love what I do. I'm very fortunate that God has given me the strength and the courage and the people around me to help me do what I do.
I like vengeance as much as the next guy, if the next guy likes vengeance a whole lot.
Prayer or not, I want to believe that, despite all evidence to the contrary, it is possible for anyone to find that one special person. That person to spend Christmas with or grow old with or just to take a nice silly walk in Central Park with. Somebody who wouldn't judge another for the prepositions they dangle, or their run-on sentences, and who in turn wouldn't be judged for the snobbery of their language etymology inclinations.
Dare, will, keep silence.