You're saying "realistic" and "consider," but what you're doing is beyond that. You've spent 18 pages now. You keep repeating that everyone else is promising that your wife will magically become sexual or that if you just try this or that one idea (that you've already tried) it will fix things, or that everyone is "guaranteeing" sexual desire from your wife. No one in the thread has guaranteed or promised anything. You are recasting what we've said in absolutes because it's easy to debunk an absolute. At the same time, you're talking about considering the possibility of failure, but you're acting as if you believe in guaranteed failure. It's only fear. It will pass.
I can help you with this much, though: don't read "women's" magazines. If you do, don't believe what you find in there. The women who write in for advice or to tell stories are generally accepted to be fictional characters. The advice is pointless at best, harmful at worst. Think of it this way--would you take your sex advice from Maxim or GQ or any of the other silly "men's" magazines? Same thing.
Search "Pervocracy cosmocking" for a very sexual woman's take on Cosmopolitan, the queen of sex advice for women in "women's magazines."
