I don't think it's because they're deliberately crappy archivists.
The fact is, when you have a company and you have to meet payroll, service customers and make a profit, archiving content that you're not making money from, is sort of a secondary thing.
A lot of companies don't archive anything not even the stuff they make a profit on. they just wing it and hope that when they need it that someone close to retirement will have a copy in the bottom drawer of their desk.
Most of it doesn't exist as paper any longer. I rarely print things out and save even less. I used to have big file cabinets at work. Now I maybe have a few file folders with archived work-related materials.
The rest is either on a local hard disk or a cloud drive.
The fact is, when you have a company and you have to meet payroll, service customers and make a profit, archiving content that you're not making money from, is sort of a secondary thing.