Also, @orangeleopard, no child will get an autism diagnosis unless their needs are "affecting their day to day life", per your title. It's part of the diagnositic criteria that there must be a significant impact. No child would be added to the waiting list at all without evidence that there are issues affecting their day to day life.
to further demonstrate the point I've made earlier in the thread, I'd be interested to know you'd characterise my daughter. She is likely one of the children you'd dismiss as unworthy of support. The master-masker, very bright. One of those children that people like you say "doesn't seem autistic". Yet after starting school - despite all the support and interventions and preparations we'd put in place at home with emotional regulation, executive function, anxiety, etc - she reached total burnout twice in Reception year resulting in panic attacks where she could not breathe properly, refusing to eat, waking screaming with nightmares, violent meltdowns, regression in executive function so she couldn't dress herself or be in a room alone and had to sleep in my bed again, crying herself to sleep saying repeatedly that she didn't want to live any more days and wanted to never wake up. Saying there is a hole and just black where her heart should be and she doesn't know who she is and it would be better if she was not here. Aged 5.
Yet at school she is so desperate to fit in and be liked and is very sociable so holds it all inside and masks all day. They say she is "fine". People like you no doubt would say that her autism is "mild" or "not severe" because she is articulate and very intelligent.
She ended up missing an entire term of Reception because of total burnout and mental breakdowns, until we could get the school to put the support she needs to even attend safely again in place, because she is discriminated against because she masks and doesn't cause a problem for the teachers, and is so intelligent she met all of the learning targets despite missing over 1/3 of the year.
Yet if she struggles like this in Reception, can you imagine the damage that will be done later when social relationships are more complex or friends reject her for her differences, and demands at school to do what they want rather than follow her own thoughts and interests ramp up? The risks of harm that she will be subjected to in teenage years terrify me (autistic girls with high IQs being at a risk many multiples of times higher of bullying, abuse, sexual assault, rape, self-harm and suicide; largely because their support needs and vulnerabilities are minimised and dismissed because people conflate intelligence and support needs when the two are totally different).
On the surface you would say her support needs are small because she isn't disruptive and appears to be "fine" while she's masking. You'd also be entirely wrong.
Fortunately she diagnosed before starting school because being autistic myself I picked up the signs early, took her through the initial stages of NHS diagnosis then on their advice had the final assessments done privately to speed things up, so she'll not be blocking up the waiting list your son or others are on. But she most certainly is not less worthy or in need of support than your son is.
I strongly suggest you seek support from other parents with autistic children who provide astonishing support networks for each other despite the demands on them caused by failing services and schools, rather than trying to characterise them as the enemy.
You have no idea how much someone else is impacted by their autism and how much support they need by meeting them casually. School staff who work with them all day but are not doctors and specialists often don't even have the faintest understanding, even with reports from numerous psychologists, SALTS, OTs and neurodevelopmental paediatricians provided to them they still don't seem to be capable of understanding a child's needs, so as someone who barely knows a child and observes them only in certain environments you are in no position to make any judgement on the "severity" of their needs at all.
I really hope you take this and the other comments in this thread explaining similar on board. It's bad enough that the parents of autistic children have to fight just to have their children's basic legal rights to access education enforced. Creating division between autistic people is not the way forward.