Clouds have user accounts too. I have seen dead links to documents in a former employees space on sharepoint, confluence, and google docs.
Who knows what happens when I've shuffled away from my current company.
Dead links are also incredibly common, particularly because we are on our nth port from sharepoint to confluence to whatever back to sharepoint. Generally, because C levels don't want to pay for this year's price hike.
They probably just used now-outdated practices before those practices were outdated. This happened in the past, remember. Sure, the cloud is a thing today, but was the cloud such a thing 5, 10, 20 years ago? Do you really think it's their fault for not knowing in advance how much of a thing the cloud would one day become? Oh, how outdated. Sheesh.
Yes, yes, and no.
For example, https://www.explainxkcd.com/wiki/index.php/908:_The_Cloud is from 2011.
Old animation though I wouldn't necessarily expect to only have been 10 years ago, and 10 years ago I wouldn't expect to be scolded for not using the cloud.