> it seems that the reality is that people with DID do have supressed memories because people have remebered them while in treatment.

so you are talking about repressed memories.
some people have claimed to remember certain things and there has been external corroboration of what they claimed to remember.
some people have claimed to remember certain things and there has been no external corroboration of what they claimed to remember.
some people have claimed to remember certain things and there has been external corroboration that what they claimed to remember never happened.
some therapists have been sued for inducing false 'memories' in patients.

the notion of recovered memories is VERY controversial.

I think that the danger is when therapists and clients come to believe that there must be trauma of an 'objective sickening severity' in order to JUSTIFY present distress / disorder. if therapists and clients believe this then clients will come to 'remember'.

some people have DID without having had trauma of an 'objective sickening severity' in their history.

i was reading about this case in Germany the other day and the trigger for her developing alters seemed to be spending several years on the internet playing role playing games for 12 hours per day. clearly things weren't okay in her life for her to get that involved in the role playing games... but looks like (and client reported that) playing the role playing games was the major trigger for the development of alters.

most disorders have multiple pathways to them / multiple aetiologies. combination of genetic / innate predisposition and environmental features. things don't have to be of 'objective sickening severity' in order for a person to feel traumatised (especially given genetic / innate predisposition).

i'm not at all convinced that 100% of cases of DID are caused by trauma of objectively sickening severity...