So if you've never had a drinking problem do you say alcoholism doesn't exist? If you've never experienced dark overwhelming anxiety do you say Depression doesn't exist? If you have no trouble focusing do you say Attention Deficit Disorder doesn't exist? If you've never been to war do you say Post-Traumatic Stress Syndrome doesn't Exist?
Okay, Ferret. I am sorry, but you are
over reacting. Writer's Block does not even belong in the same sentence as alcoholism, depression, or PTSD. Seriously. (And anyone who would even suggest it has never experienced any of those, not even second-hand).
There is no such thing as a psychological disorder that makes it impossible for a literate, other-wise healthy person to be able to write. There just isn't.
I am sorry if none of these techniques work for you, but how many of them have you even tried? Frankly, I have used nearly every idea pen-monkey listed, and each one has worked for me under different circumstances. Sometimes it's just a matter of picking the right one. Personally, I have found nothing works so well for getting through writer's block as just writing. Instead of rambling, I write about the story. I write what my problem is, why it's a problem, possible solutions and why they don't work. It helps me think out what the problem is, where in the story the problem is, and how to get rid of it.