To answer the first part of your post, it isn't this simple. You may well have assumed you would get better, but if we take predictive processing, the key issue is whether your brain determined you were safe or not. Multiple factors can potentially play into that decsion. Subconscious danger isn't a 'damaging idea,' it's how the brain works. We are bombarded by a huge amount of information daily - that can range from tv adverts, newspaper articles, things people share online, conversations, cars in the distance, bikes, dogs on walks, things that will relate to past (bad and good) memories. Thousands and thousands and thousands of bits of data that we can't hold in conscious awareness. Our brains make shortcuts in processing this all the time, we couldn't function without that. So your brain has one eye, essentially, on threat, in a way you aren't aware of. That is established fact. It means we can act quickly if a car veers off the road and heads towards us - we may be walking and in conversation with someone but can then spot it and act before we have time to make a conscious decision about what is happening.
None of this is about insulting you and your character, it's about the world of the brain beneath what you're aware of and it acting accordingly (i.e with a sickness response that is cleverly designed to keep you safe by getting you out of your environment for any number of reasons, including survival of your tribe)
NONE of this is being used to 'bash' people with M.E. That is pure hyperbole. It's the opposite, it's trying to HELP people understand themselves better. A key question becomes, what might have been going on in my life to trigger my brain to trigger a sickness response when my symptoms stared.