Why is it so naive to be able to recognize that:
1) Sex really isn't all that important.
Because, frankly, it is VERY important. Indeed, from an evolutionary standpoint, it is the MOST important thing.
2) I can live just fine without sex.
Because you are flat-out wrong.
This is like saying you can live just fine on nothing but Exceed energy drink and vitamins; perhaps you could, at least biologically, but what kind of life would it be to deny yourself the pleasure of eating and drinking? You could also live "just fine" without entertainment, sunlight, human company, education, or physical exercise, at least for a while. You would just be less comfortable and satisfied than people who did not have those things.
What this keeps coming back to is that you have no idea whether you are "just fine," because you have nothing to compare your situation to. I would have said the same thing when I was a virgin, but now I know that "just fine" without sex is not really fine at all.