I remember interviewing a guy who worked at Amazon - he commented that he started trusting AWS much less after getting to know some of the developers who worked on AWS.
Yep that. We are a fairly high spend customer which gives us direct access to engineering managers there. Some of the non-core products are run by what looks like two guys in a trailer protected by a layer of NDAs and finger crossing. Had some pretty crazy problems even with their core stuff over the years which absolutely knocked my confidence.
At the same time, I've had two separate Apple SREs in the last 5 years tell me that I should never trust their cloud services.
If you can't see it and can't control it yourself, then you accept these things silently.
My distrust for this goes as far as the only thing actually being subcontracted out for me is Fastmail, DNS and domains and the mail is backed up hourly.