All disorders are just labels trying to encompass the complexity of the entire human brain at every level. If you hear stories from people diagnosed with something and you're surprised by how much you relate to it, then you're surprised by how much you relate to it and can empathize on some level depending on how it impacted you and the person whose story you're comparing to. Or maybe you strongly relate but reject diagnosis for some reason. Maybe you feel you have a strong reason for this that isn't easy for others to understand, and maybe that's correct.
Some critics say psychological labels are invented, not discovered.
The medical model of the human brain is good for billing insurance companies and standardizing clinician behavior i suppose but not necessarily an objective reality.