For Google/Apple/etc., I'm either not paying them at all (in which case they have very little incentive to help me off someone goes wrong), or I am, but for a basket of services. The identity portion of those services is probably not what that company is focusing on providing, and any weirdness with any other service in that basket could cause me to lose my access to the identity bits, often without recourse.
And keep in mind that being a domain name registrar is a low margin business (typically they're only grossing a few bucks per domain per year, before accounting for any other expenses like staffing and systems), so you're not gonna get great support.
I believe they are advocating for minimizing risk by not deeply integrating with capricious cloud providers.
(My Google account is dead even though I have the username, password and recovery email which forwards to me since I don't have the phone number)
However the big problem is I am frequently banned from emailing gmail or office365. Never Apple for some reason. So I can read email but I can’t that well send it. But I don’t really care much, mostly people have to tell me out of band to check my email if they have sent me email. My email sessions are mostly a review of current spam practices and questionable emails from firms I have done business with.