I just re-read this page. Probably could benefit from reading the whole thread again, as I forget so much. Yes, this all applies to me--speed, intensity, noise, too many facts, multi-tasking--I have little energy for. They wear me out so fast they are not worth it unless I must deal with it--no choice. I think this could have to do with the poor autonomic nervous system, the poor sympathetic nervous system. Trying to activate and use anything involving fight or flight or adrenaline, such as the above, causes rapid fatigue. Add to this, trying to do these things standing, or walking or even sitting up straight for a long time, makes it harder, maybe impossible.
I used to like all that stuff and do it. I didn't choose to stop. Just lost the ability. A lack of capacity fo exertion, is what it comes to, and the need for quietness, rest and lying down, to allow the brain speed and system to slow way down. Then it can recover, catch up and re-balance, although this may take hours, or days or weeks, depending on how far out of bounds I or we pushed.
At the other end of the spectrum of capacity are top athletes, human or animal (like race horses). They too exceed their limits when they compete, and can need considerable rest periods afterwards in order to be equipped to do it again.
The normal, expected capacities in life in relation to us are like the extreme performances of top athletes. If we do it once, others expect we can do it all the time. I feel so frustrated by this. Here is why a doctor may not find us "ill", if we have rested up for days in advance and prepared for hours to present. The doctor sees and hears no problem. Then we have to lie down and rest for days afterwards. Our retreat is silent and iincapacity nvisible.