Sorry just seen this.
I think you're being genuine, but without wanting to be rude, I do think you're not seeing the whole picture here.
Even excellent SEN provisions aren't mind readers. Autistic children need very different things to neurotypical children - and without a diagnosis you are expecting the teachers to unofficially diagnose.
I've explained why it's important several times now. Needs aren't always obvious. Particularly with girls. So many of our girls are being desperately let down, they're being missed and it's disadvantaging them in school, and moving forward into their career. Boys get disproportionately diagnosed compared to girls. Girls mask. Teachers - with the best will in the world - simply don't have the time to spend with each individual child to tease out what might be autism. A diagnosis is absolutely vital so that the right measures can be put in place right away. Lots of our autistic children get missed - until they reach crisis point. Lots of autistic teens self-harm - and if proper support was put in place earlier, that might not be the case.
The gold standard for a very long time has been early identification and early diagnosis. It's pretty much universally accepted that it makes a big difference. I am really really struggling to understand why a few people on this thread are saying that it doesn't matter.
And yes, as an autistic woman myself, I'm really struggling with the fact that I'm telling you that it does make a difference - but people are telling me that it doesn't. Yet I know it does, it's my life and my neurodiversity. And that of other autistic adults, and beyond, our autistic children. The vast majority of autistic adults will tell you what an enormous difference knowing that you're autistic makes. Going beyond school into university, and into employment. Employers absolutely won't make any allowances just because you tell them it helps - unless you're lucky and they're lovely. Explain that you're autistic, and then actually they're obliged to make reasonable adjustments by law. reasonable being the operative phrase here, obviously.
You say it should "cross people's minds" that a child might be autistic - but then what? Treat them as autistic even though the measures you'd implement for an autistic child might be counterproductive if they're NT?
And here we go again with the whole "you don't need a label" - it does make a difference. What we haven't even spoken about is the difference it makes to the child. When they're capable of understanding what autism is, knowing that there's a reason why they feel different, knowing why maybe they struggle with things that others find easy, knowing why they find it difficult to make friends....it makes a difference knowing there's a reason.
If an autistic child could clearly communicate their needs and point out specifically to the things that they need to be changed, then yes, diagnosis would be superfluous. But autistic children can't communicate their needs clearly, that's an inherent part of their diagnosis. And they could be masking so heavily, it's almost impossible to identify what the actual underlying cause is. There's no flashing lights highlighting what to do - which is why the diagnosis makes a difference.
I can't actually believe I'm having to justify why a diagnosis is important. I really can't. It's vital on so many levels, and not just so that teachers have accurate insight into what a child's needs are.
The only thing I will say however, is that I don't know how we fit this very real and vital need in with a health service which is utterly broken and already not coping. I don't know how it fits in.