androidcentral[.]com/android-and-chill-nougat-and-root-question
Windows lets you create restricted accounts, though I think most people log in with full administrative access, only seeing restrictions when they click OK on the occasional message window. With Linux, having full [Root] access is the exception rather than the norm, and with the Linux-based Android, you're simply locked out -- by default or as shipped, all account access is restricted.
There are Android apps that let you remove those restrictions, it's called Rooting the phone, and criminals use those apps, along with users & Android app developers. Users may want to customize the software on their phones, &/or change some of the ways Android works. Developers, e.g. some that offer backup or Android <-> PC communications apps, may need the phone rooted in order for their software to work as designed, so app installation includes rooting the phone. And criminals like it because it allows them to bypass restrictions that would [hopefully] prevent them from installing & running malware.
Because of the potential for criminals to use rooting for malware, closing the door on rooting, with procedures similar to Windows Secure Boot, makes Android devices more secure. It also blocks some methods of removing manufacturer &/or carrier crapware, and renders apps that need root to function useless, so there's probably going to be some complaining along with debate.