I'm very new to Linux, have used Ubuntu, Mint, Elementary and KDE Neon for 2 or 3 days altogether on VirtualBox to select 1 for installation on the laptop I use daily. I've chosen KDE Neon 5.16 and have been using it for last 3 days. First problem I faced in this distro that when I tried to paste a file that I downloaded from a website from the Downloads folder to a partition/device, namely /dev/sda3, it didn't let me do that via GUI initially!
I then tried to log in as the root, following along the example given here, to have all privileges BUT I couldn't actually login as root through the login screen, to operate the system! It just gives an alias named sudo after logging in as an ordinary user to execute some ownership and permission cmdlets!
From such behavior of this distro what I've understood that these Linux distros actually have built a bridge between root and user through some messaging protocol and developers of these distros obviously have full control over my laptop via network socket, am I right? If I'm right, how are these distros different from Windows or Mac in terms of security? Is there any workaround in KDE Neon to log in as root when it prompts to log in?