Advice (from Blargel)

Yea, when speaking casually, particularly when speaking offline, people tend to start sentences with words like but or like. It's not that they're incomplete sentences, its still a complete thought. They're slang. The word like is short for it's like, just omitting the first word. If I was trying to be formal I wouldn't use the word like at the beginning of the sentence, but I was kind of trying to be formal but also casual, and it resulted in a mess apparently.

You're right, "polar opposites" and "black and white" are not interchangable but they can be a related issue. For example, masculinity and femininity. People create these ideas and bundle up being artistic, introverted, unintelligent, expressive, and unstable into femininity and scientific, extroverted, intelligent, inexpressive, and stable into masculinity. Guess what, these things have nothing to do with each other and have no business being associated with one another. Someone can be scientific, introverted, intelligent, expressive, and stable. We just like this idea of making things black and white, then saying you are not this way because that is the opposite of what you should be. To me, that says a lot about the state of society than an individual. I see this kind of thing everywhere. Maybe that's just because I might want to find it, that it might not always be there. I'm terrible at explaining things.

That has nothing to do with black and white, that's stereotyping. It's not even polar opposites. Polar opposites doesn't typically refer to supertypes like "masculine" and "feminine", also it expressedly refers to the speaker's opinion rather than presupposing the claim as a fact.

Black and white refers to a clear cut divide. Moral and immoral, typically. Where something is one or the other and there's no gray area (eg. people say murder is always bad, but then say war is okay; that's a gray area).