Agreed.
I've always had a much greater mental endurance than my peers. I remember seeing advertisements at a bike store for very long (300+ km) bicycle rides and I genuinely believed that was something I'd enjoy doing. Sadly I became ill before I had a chance to try it.
Before I became I'll (I became ill when I was 15), I believed I was genetically gifted in that regard, because my father was a marathon runner (now ultramarathoner).
Same here: before I fell ill, I was an avid mountain and rock climber, from high school all the way to the my late twenties, having climbed many ranges in Europe and Eastern US.
I was also a competitive swimmer (freeslyle stroke) from high school through college.
Now a single flight of stairs leaves me panting and trembling.
In the cognitive area I was quite successful: well I have three college degrees (B.A., M.A, M.S) , and like Jen Brea, I was in the process of selecting schools for a PhD... ME/CFS hit me right at that process, and never even had a chance to start the PhD application program, spending the best part of the first two years of my illness crashing and bed-ridden.
Now I don't have a functioning memory, and brain-fog thick enough to hide an iceberg.
But I should just stop complaining and "play through the pain", right? Note: I have been "playing through the pain" for 16 years now.
Like I said before, I would love to see all these trolls and vitriolic
know-it-alls spend one month, just one month in our shoes. Then we would talk about whining.