Probably more effective, if you ask me. Which you didn’t but i’m going to conveniently ignore that detail :)
It’s a funny thing, i got interested in ‘politically correct speaking’ before it became code for ‘trying not to offend anyone’. Two decades ago it was just speaking in a way that would prevent those you were talking to, to get defensive. Once a person goes on the defensive they are no longer listening to what you are trying to say. They are thinking about how to defend their own opinion and your message is lost. It wasn’t about pleasing every person who would hear you, just ensuring your target audience would be able to absorb your message. — Slight disclaimer: the books i read were either dutch or dutch translations, so maybe ‘politically correct’ is not the exact term. I’ve just always worked on the assumption it is what was originally meant —
What is true in any language, is that people will remember how you made them feel long after they forgot what you said. If you can make them feel heard and respected, next time you speak they will pay attention. If you make them feel attacked and belittled, next time they will go into defensive mode before they even heard (or read) a word.
So if the goal is getting a message across, and you are certain the person is disagreeing with you, thinking about how you bring that message is the smartest thing you can do.