I think you're being overly cynical. Of course over time as science advances we will recognize more subtle distinctions between things which we used to perceive as the same. That's how science works. Just because two separate things are similar and sometimes found together doesn't mean they are identical.
Whether something is a "disorder" or not is somewhat subjective and opinionated, for sure. But as someone diagnosed with ADHD, I often find that the expectations of modern society can be debilitating. Whether the disorder lies in me or in an unaccommodating society is an interesting question, but it is a separate one.
Please email me and take my personality test! Please. Y'all are like Bigfoot. You drop a wonderful comment like this and then disappear into the ether.
SPD has the worst outcomes of anything in the DSM. Only someone with SPD could possibly ever see it as the non-broken state, or as not a disorder. You're exactly the type of person I'm talking about. Do you see your vocabulary? Please contact me! I'm a philosopher working on a new model and could really use your point of data.
Whether something is a "disorder" or not is somewhat subjective and opinionated, for sure. But as someone diagnosed with ADHD, I often find that the expectations of modern society can be debilitating. Whether the disorder lies in me or in an unaccommodating society is an interesting question, but it is a separate one.