Having a diagnosis gives you the option to try medication of several varieties that are not otherwise legally available to you in the US.
For some people the medications Just Work, with no negative side effects. If they do that for you it could be a big win, but one you can't safely or lawfully test without getting a diagnosis.
It also gives you a well-defined problem statement for tackling the "lingering family issue" and for communicating with your family about differences between your neurological wiring and theirs that all of you need to cope with, if you do come up with a diagnosis.
For some people the medications Just Work, with no negative side effects. If they do that for you it could be a big win, but one you can't safely or lawfully test without getting a diagnosis.
It also gives you a well-defined problem statement for tackling the "lingering family issue" and for communicating with your family about differences between your neurological wiring and theirs that all of you need to cope with, if you do come up with a diagnosis.