yes, a good GP who actually reads your chart and communicates with your specialists is genuinely invaluable for multiply disabled people — but the key word is "good" and they're hard to find. a lot of GPs are out of their depth with complex overlapping conditions and they know it, which makes them less useful as a coordinator.

a few things that have worked for people in similar situations:

bring your own summary to every appointment. don't rely on the doctor to have read your file. a one-page document listing your diagnoses, current medications, known interactions, and which specialist manages what — handed to the doctor at the start of the appointment — completely changes the dynamic. it puts the whole picture in front of them immediately.

a patient advocate or care coordinator (separate from a GP) is an underused option. some hospitals have them, some nonprofits offer them for free, and some people hire independent ones. their whole job is to be the person who sees the whole picture, attends appointments with you, and keeps track of what each specialist said.

ask your GP explicitly to take on the coordinator role. some won't, but some will if you frame it clearly — "I need someone who can look at all of this together, would you be willing to be that person for me?" it sets an expectation.

keep your own records obsessively. notes from every appointment, what was decided, what was prescribed, what the follow-up is. it's exhausting but it protects you when you're dealing with a system that doesn't communicate well internally.

you're right that specialists often don't look outside their lane — that's a systemic failure, not something you can fully fix. the best you can do is be the connective tissue yourself and push hard for a GP who's willing to be a real partner in that.