The unpleasant answer is that if you give people linux style updates, every Windows 10 install becomes part of a botnet like the bad old days. No operating system I know of other than Linux actually gives you the option to do updates piecemeal and security is one of the main reasons why.

For the record I hate this, but history has shown that if you don't try your absolute hardest to get security updates installed onto users' machines, they're going to constantly get owned by malicious third parties. Chrome and Firefox aggressively auto-update for the same reason (if you try to manually install old Chrome for testing it'll obliterate itself on next launch!) The vast majority of users simply do not pay attention to security and will not make the right decisions if you offer them choices about updates and security, because they don't have enough knowledge or context to make the right choices.