for certain characters, it makes sense that certain persuasion check options would not work. for example, attempting to intimidate a huge troll should fail, as it would be sensible narratively
It is an innovative design. Figuring out the most persuasive option is trickier and more interesting than a single skill check.
Unfortunately, Larian made a mistake. They shouldn't have shown the required attributes. That's misleading. If your talker was a fight-type character, it would occurs to most players that strength options are more likely to succeed but it's actually not true.
