Hi Chris 100 i have seen a few treads where you’re asking for advice.
unfortunately
I don’t know your age or why your asking the questions, so I assume it’s for yourself now your question : “
How important is it to have an Alzheimer's diagnosis “ again the answerer on depends age also on how dementated and capable the person actually is then they possibly need a lot of support from carers ect its very important to have a diagnoses ,
However if the person with dementia younger is still mentally alert and capable to manage their own affairs or wants to continue working , driving and living ect and normal active life “ having a diagnoses can drastically change your life entirely because the bureaucrats will Try to run your life its defiantly something to think about
but again please read this as my opinion
Chris given from my own personal experiences of a dignosees for almost 23 years
but its not advice