Getting my ADHD diagnosis was very validating for me. It validated the struggles and experiences I have, and allows me to be kinder to myself

Not the labels per se but being able to identify patterns and processes can be a comfort and even helpful if you have the right guidance and support system.

For example, identifying habitual masking (even when unnecessary) and making the decision not to mask can be helpful when socialising by conserving energy and making them more meaningful without the doubt and shame of "faking it". Also giving yourself credit for feeling emotions and stimuli intensely and deciding for yourself to move away from to self-regulate.

The "label" should be foremost for you, hence why some don't feel comfortable getting an official diagnosis (especially in the U.S.)

In my case yes absolutely, being able to identify it and get help with it did definitely help

For some they are, for some they're not, I guess. Personally I do think it helps me understand myself better , but then again I was diagnosed as a kid for ADHD, but have been off meds for 20 year (I forgot to take them and eventually stopped altogether)

As a parent, helping children to name their emotions when they feel something is the very foundation of getting them to recognise what's happening and developing strategies to cope with the strong feelings.

I've been told by parents of kids with autism, and by friends who's received formal diagnosis that it is a very similar mechanism. The 'label' helps with recognising patterns of behaviour, and helps them to develop coping mechanisms.

I would say they’re useful for peace of mind and better understanding of the self. But also for interacting with other people since saying you’re autistic is a lot easier for people to understand than explaining how you work. Lastly if you’re low functioning autistic a diagnosis can also qualify you for disability benefits. I personally saw a major improvement in my life from that last point.