There were many reasons for this, the biggest one being, that OFP is a combat simulator, based around real physics and suchlike, and thus should be respected for the stand it's taken.
Think about the above and try to see the concept behind OFPEC, the ofp editing website.
This matter is as simple as selecting either a jelly doughnut or a chocolade one.
You can't have both, because that would be too much for a) the one who makes the doughnuts with his sweaty arse and b) for the one who tries to eat it.
When you go buy a magazine, you can choose from many the one you like the best. If it's pr0n you prefer you take one of those. Comics fan takes the Donald Duck. News and porn and Donald Duck aren't all printed in the same magazine.
To be able to bring out the best, you must focus your energy. OFPEC speaks for this statement as
the best OFP editing site there is. The power lies in taking a bite you can swallow and frankly, adding sci-fi to the soup we'd need a lot bigger spoon.
You see? There are other sites that do the sci-fi and serve the ones the need. OFPEC should, must and will remain in it's current focus with the resources available to her.