The point is, that only means that if you *want* to play a generally social creature who can shmooze / threaten / lie their way into and out of almost all sorts of trouble, you *can* do so, but you're by no means *required* to play such a character to be able to get all sorts of interesting, useful and not to mention *unique* options in dialogue and respectively, non-combat resolutions.
BG3 is simply not as "simple" as many other C-RPGs where CHA checks are often your *only* option to solve things via conversation. Your race, class, subclass, background and also lots of non-CHA skills: all of these matter and can help you get your foot in the door.
Yeah you don't technically *have* to do it but it feels like too big a part of the game. Those checks will constantly be there even if you are bad at them so I feel like most people will probably want to take advantage of them at least some of the time. At least for the first 2 or 3 playthroughs I've got to have those because it feels like where a lot of reactivity comes from.
