I agree with this. My son was only diagnosed with ASD at aged 16 due to a change of consultant.
it was the NHS that first raised the issue of ASD as my son had complex needs eg hypotonia not able to swallow for 2 years and prolonged fits. The NHS went through the ‘list’ eg Downs, muscular dystrophy etc and one consultant landed on ASD. He was retired and the next one spent over a decade prevaricating whilst saying DS has complex neuro development disorder. In the meantime SALT NHS said definitely ASD speak to consultant to confirm diagnosis. Son had severe receptive language impairment and semantic / pragmatic below 1 st percentile.
school blatantly lied and said he was eg average at sports when for example 2 kids helped him into the sack for sack race and all the kids exaggeratedly cheered as he tried to jump in the sack using his arm rotating to propel himself. As the NHS SALT and OT did their own tests and diagnosed severe needs there was this odd lack of consistency between school / paediatrician and the NHS OT and SALT with even Great Ormond Street on on the act saying DS had severe receptive language impairment and needed 1:5 classroom setting. Severe receptive language impairment with pragmatic issues is classic significant ASD.
School said he’s fine ( despite having prolonged fits bowel disorder and an inability to swallow for years plus hypotonia) The consultant preferred school to his own SALT and OT in that regard.
Secondary school had to sort out the mess and place in far more support than in his EHCP and luckily I got the daft headmaster in junior school to at least apply for top up funding. I remember watching DS bouncing up and down/ flapping in an open evening and that daft headmaster deliberately ignoring it - all very very odd.
Fast forward that daft consultant retired and the new one within 10 minutes says ‘you know he’s ASD don’t you - we need an urgent ADOS’ He had an ADOS within weeks.
As an adult he ie very obviously ASD and when it’s like that it’s not ‘hidden’ it’s there to be seen. I wish it was hidden as he is bright and lovely but his life choices and opportunities to work will he limited to sympathetic employers.