Its a cousin of the mindset that the reason people don't steal is because they think they will be caught and rationally weigh up based on the value they gain and the chance of loss that its not a worthwhile action.
No, most of the time people steal because they think its wrong, and they dont want to do it.
Public trust is a real thing and varies massively by country. America is notably extremly low on this metric
Do you want performance, or correctness.
Well, if you want performance you use write through caching and in the case of distributed storage: more nodes confirming the block before returning. Huge performance cost.
Outsourcing this just means someone else makes these tradeoffs, they will prioritise the general case- and they’re even more incentivised to move the needle towards things that are most visible to the end user.
In this case, performance.
You won’t notice that theres a third commit server off-site (unless that site is bombed), but you will notice slower writes- and the general case says that people will express comparative dissatisfaction with weaker performance and use it as a justification to use another provider.
So any software company/project which actually took the time and effort to fully handle the enormous complexity, they can't sell themselves based on that fact because every other company (who didn't invest the effort) is also claiming it and the customer has no mechanism to verify the claims until some major rare event occurs.
And most of the effort is required precisely to handle those 1% of rare situations.