People who are raised by people who don't struggle as much (and consequently are unable to relate or empathize meaningfully with ND struggles) are likely to grow up thinking they are broken and that they must hide who they are to avoid inconveniencing others. This might seem quaint, but think of it in terms of survival - not politeness.

When you see people commenting things like "omg I thought it was just me" or whatever, it's possible that this is the first time someone has ever felt like they weren't fundamentally alone. Once we get to this point, we can start to feel a bit more confident about learning more and/or seeking help.

And finally... your argument, "it's just less", is really fucking stupid. How is magnitude not relevant? Did you think before you wrote this, or are you just embarrassingly confident by default?