Absolutely that. For networks that matter, patches are usually tested independently. While I wouldn’t trust the average military command to do patch testing, any civilian/corporate contractors absolutely would, because money. (Microsoft is likely at the top of that stack…)

There are other conditions as well. EDR infrastructure, if it exists, would need to be isolated on a “Government cloud” which is a different beast completely. Plus, there are different levels of networks, some being air-gapped.