The success stories are relevant because they do happen. Whilst I totally agree that people need to grieve and accept that they may never have children and that the platitudes are often crass, there's no benefit in making it sound like trying is totally hopeless.
I come from a very large family, I had never even contemplated that I might have a problem conceiving. I couldn't get my head round it. I tried everything, but nothing worked and after 15 years we finally had to accept that it wasn't going to happen. That was tough. It was the hardest thing we ever had to do but, gradually, over a couple of years we started to accept the benefits and plan our lives accordingly. We sorted our finances, prepared for a lock, stick and barrel move to Europe and finally we were happy again as a couple with great plans. Make no mistake, it's a very tough place to be when you are in the thick of it.
And then, inexplicably, I fell pregnant. I was almost 40, dh a decade older and we finally had the thing we had always wanted. Except it didn't feel like that. I felt like I had been robbed of my plans all over again and I had a major stress attack about not wanting the baby, being too old, I even considered aborting a baby I had wanted for 15 years - I just couldn't deal with it.
We shelved our plans to move, sorted out our lives once again and had the baby. Two years later I fell pregnant again. My boys are now strapping great teens and the pain and heartache we went through just a distant memory.
I heard all the stories of miracles, listened to well meaning advice on how to get pregnant, watched my sisters have 13 children between them, was disgusted by people I felt took their children for granted and hated them all because they had what I wanted. Even after I had accepted it.
Miracles can and do happen, iVF can and does work, people can and do survive childlessness. There are many ways to feel fulfilled and happy with or without children.
OP I wish you all the best. You will know what's right for you and which path you need to take. But there's no need to give up hope just yet, you have a long journey ahead and hope can often help keep you going.