@Markerrag -- I think the article does a good job of pointing out why people would want to take out a triple net lease, but I will provide another. Simply put, this kind of lease means you can get a low payment without having to be tied to a piece of property.
Think about it. You might essentially be paying around as much as a mortgage payment, but you can pick up and leave when the lease expires instead of being stuck owning something.
That is a real blessing in the commercial context as areas go in and out of fashion in a hurry. If you own property in an area that falls out of favor, have fun watching your property values drop. If you lease a property in one of those areas, just cut and run when the lease expires and leave it up to the owner to deal with that dog of a property.