That statement just says that a SWCG can be a source of chlorine.

I don't have a SWCG and don't know a whole lot about them but just from reading here I've observed that water chemistry still needs to be adjusted occasionally. That means people with chlorine generators do use BBB&W&M (bleach, baking soda, borax, washing soda, muriatic acid) to manage pH and TA and I do know they use a liquid form of chlorine if they have to shock the pool or raise the FCs because the generator isn't keeping up.

BBB and SWCGs are not mutually exclusive. SWCGs are one way of introducing bleach to a pool. BBB is a philosophy: test your own water, understand the basic principles of pool water chemistry, get nearly all you'll ever need to put in the water in the grocery department, take control of your pool.

Whether you use Clorox, concentrated liquid chlorine, tabs, or a SWCG you still have to have a grasp on pH, stabilizer, buffer, calcium requirements; you have to know your pool.

Off my soap box