It's not "off" unless you're simply reading it literally. If you do that, then it's a verbose way of saying "I agree". But the connotations are something like "I agree, strongly, and in particular am implying (possibly just for effect) that there are objectively right and wrong answers to this question and the other answers are wrong." The main difference is the statement that there is an objective answer to what people may be treating as a subjective question.

If it helps, you can think of it as saying more about possible disagreeing opinions than about the specific opinion expressed. "This answer is right, and the people who disagree are 'objectively' wrong."

It took me some time to catch on to this. It can certainly be jarring or obnoxious, though sometimes it can be helpful to say "yo people, you're treating this like a subjective opinion, but there are objective reasons to conclude X."