These guys are selling FreeBSD consultancy, so I don't know how this article can be unbiased.

> On Linux systems, it is very common to use sudo for operations that require root permissions

Not common unless authors used Ubuntu desktop, which pushed sudo usage to the extremes. I don't even have it installed. However, frequent sudo usage usually indicates something is wrong with how you use the system, maybe account permissions or lack of knowledge of how to use it properly.