I'm in a similar situation is you are, having ADHD, and my observations have been similar. I've been more hestiant to use AI at all for a while at the beginning but even now I only ever use it for one thing at a time. It helps me tremendously with the things I want to have done but not do - find out who clutters my home directory, build a small DMS plugin for local models, stuff like that. But even if I work on a bigger task and idea, it's mostly one thing I use it for at a time.

Maybe you're right in the fact that the coping mechanism help with that. Maybe using LLMs is similar in that it is easy to lose focus for neurotypicals so having lived with that we know how to handle it. Or maybe it's just us, who knows.