That's why the same question really applies to standard but insane practice of using sudo to get root. There is no security difference between root and lowuser that can sudo into root.

Sudoing into root from lowuser account is in some scenarios potentially more dangerous than just using both accounts separately, as the user who uses root regularly/very often gets accustomed to the fact his commands are powerful and can screw his system, so mistakes almost never happen. While sudoing all the time creates a false sense of security and the user is more likely to run harmful command with sudo.