Well, no, not exactly. Most accounts on desktop linux distros are admin accounts. The way I would define that is whether or not the user has sudo permissions, either by being in the sudo group or sudoers file. Some distros do ask if you want the user to be admin. And that’s pretty analagous to being admin on windows and getting a UAC prompt for an elevated process.
Right, that was the other point I meant to make. There absolutely is a way to seperate the powers that sudo grants. The sudoers file allows you to limit a user or groups permissions to only certain commands. Distros could and should absolutely take advantage of this.