I definitely agree. It shouldn't be "autism spectrum", it should be "autism syndrome".
When we have a cluster of symptoms that travel together we can see there's an underlying issue without knowing what that underlying issue is. And we normally use the word "syndrome" for that. For example, AIDS or IBS. And society tends to dismiss it for as long as possible because to face it is to admit there's a problem with no answer. For an example that's still in the denial phase, look at long Covid. There's clearly something there, like AIDS it's a slew of apparently unrelated issues. Which says that, like AIDS, there's probably some underlying issue that is itself very hard to see and we are only seeing the secondary effects.
When we have a cluster of symptoms that travel together we can see there's an underlying issue without knowing what that underlying issue is. And we normally use the word "syndrome" for that. For example, AIDS or IBS. And society tends to dismiss it for as long as possible because to face it is to admit there's a problem with no answer. For an example that's still in the denial phase, look at long Covid. There's clearly something there, like AIDS it's a slew of apparently unrelated issues. Which says that, like AIDS, there's probably some underlying issue that is itself very hard to see and we are only seeing the secondary effects.