Is not able to filter out non essential stimuli the cause of sensory issues for people in autistic spectrum?

I can definitely confirm this. Actually with me this filter is not just weak, it's non existent. For me this is one of the biggest issues in my life. Being at work or school or any other social activity is already extremely exhausting for me because of this, but even to get there through traffic or public transportation is already making me exhausted before I start my day. My brain is working overtime and going in a total sensory overload very often, just trying to make sense out of all these stimuli.   I have also experienced that certain stimuli cancell others out. For example if there many stimuli from the outside, they will sometimes cancell out the stimuli from my own body, like pain for example. Once when it was very crowded and noisy around me, I picked up a hot bowl out of the oven with my bare hands (accidently) without feeling the pain. I did feel the pain later when it was more quiet around me.

I know a few autistics who say this isn't a problem for them, but for most of us it is. Some autistics also have difficulty perceiving certain stimuli, though they may be more sensitive to others.

From my toxicology perspective, multi-sensory sensitivity that waxes and wanes with exposures while affecting all the senses to some degree is caused by carbon monoxide poisoning that occured when the illness began. Do autism specialists ever ask or test their patients for CO poisoning? Do autism orgaizations ever mention it? The testing is very simple: just arterial and venous COHb: if venous is larger, this is abnormal and proof that there is excess CO in tissues since more is diffusing out of tissues than going in. This can be tested non-invasively as well via the level of CO in exhaled breath. I realize a lot of people on the autism spectrum don't want to be fully cured if it means becoming neurotypical. But do any people with autism reading this want to stay CO poisoned for the rest of their life? They could normalize their CO body burden--and with it their sensory hypersensitivities-- with four months of painless oxygen therapy and/or breathing exercises that require 1 to 2 hours per day. The treatment costs almost nothing and can be done lying down. PS. The reason CO poisoning messes up sensory processing--leaving victims either senseless in a coma or with multi-sensory sensitivity--is that our bodies make and use CO to modulate the nerve action firing potentials of all our sensory nerves. I use the term MUSES syndrome to distinguish the condition in which at least four of the five primary senses are sensitized from the vaguer concept of SID/SPD that does not require any specific number of senses to be affected and so applies even to people who are just sensitive to light or sound or etc.