Windows turned that off because people refused to reboot for weeks. You can get more time with Windows pro, but updates are still inevitable.
This is because many (most?) updates aren’t actually applied until you reboot. Same goes for Linux and macOS, actually, but Linux will happily let you keep your machine vulnerable to getting hacked for months.
Easiest way to prevent unexpected reboots is to manually reboot. There are ways to mutilate your OS to turn off the forced reboots, but Windows recovers from such mutilation remarkably well as an antivirus defence.
Microsoft won’t back down, unfortunately. You could also install another OS if you’re sick of Windows and don’t care about system updates. Most of Lemmy will happily recommend a selection of fringe Linux distros are in style these days. Or you could run ChromeOS Flex on your machine, or throw a load of money at Apple, those won’t force you to reboot either!