The question is a little ethnocentric imo. It's based on a human perspective and why it's a biological issue for us to endure celibacy. Given the large number of races in the galaxy, and present in the Jedi order, celibacy may not be as big an issue for the majority of races in the galaxy. Intimacy and attachment might not be conditional on how many races breed and raise their young, so one man's hardship is another races 'no big deal' so to speak.
I think that's kind of a stretch. I think it's more likely that many more species than not have biological attachment/sex urges, let alone "social attachment" urges/instincts.
