That is demonstrably incorrect. My first post advocates for benefits that might be found in a discussion without using specific verbiage.
The semantics matter because of subjective interpretation. "I think" and "should" and "the majority of subgroup x" are not usually correlated to be the same thing, even though they seem like "semantics". The first is clear (why do you think that?, is rarely asked), the second undefined (should doesn't have a qualification) and the third subject to investigation (based on what evidence?).
I have found that morality is less often an influential factor (spaces vs tabs, fight) than the words like "should" and "ought" are used. YMMV