‘There are actually no common autistic traits, because autism is unique for every person who has it.’
That is not true. It is a spectrum disorder so it has different levels of severity. But there are common traits that identify it as a particular disorder.
FWIW everyone is a unique individual including people with disabilities or disorders. However, that does not mean that certain disabilities do not have common traits. And those common traits do not take away a person’s unique personality, temperament and life experience.
There is a diagnostic criteria for diagnosed autism spectrum disorder. I have been through the entire assessment process with doctors and a paediatrician with my family member. And there are recognisable common traits of autism which form the basis of the diagnostic criteria used by doctors to diagnose autism.
Autism is not something that anyone can be diagnosed with arbitrarily. Or something trivial that anyone can claim that they are autistic without going through the assessment process.
Below is an extract I have copied and pasted from autism diagnostic criteria dsm-5.
https://www.autismspeaks.org/autism-diagnostic-criteria-dsm-5
Autism spectrum disorder DSM-5 diagnostic criteria: Full text
A. Persistent deficits in social communication and social interaction across multiple contexts, as manifested by the following, currently or by history (examples are illustrative, not exhaustive, see text):
- Deficits in social-emotional reciprocity, ranging, for example, from abnormal social approach and failure of normal back-and-forth conversation; to reduced sharing of interests, emotions, or affect; to failure to initiate or respond to social interactions.
- Deficits in nonverbal communicative behaviors used for social interaction, ranging, for example, from poorly integrated verbal and nonverbal communication; to abnormalities in eye contact and body language or deficits in understanding and use of gestures; to a total lack of facial expressions and nonverbal communication.
- Deficits in developing, maintaining, and understanding relationships, ranging, for example, from difficulties adjusting behavior to suit various social contexts; to difficulties in sharing imaginative play or in making friends; to absence of interest in peers.