I've been out of the field for 10 years, but what I've learned since then is that "experts" don't care if the clients can actually use the system. AV? Take it or leave it, but for software updates, well, the cost of breaking corporate software with an update (they just took out our scheduling program for 4 days) is very measurable and affects everyone in the company,
If routine operations (and updates should absolutely be part of a routine) break production you're doing it wrong. The answer is to test changes before committing them to production. The answer is not to forgo needed security updates.