I like the point about giving upvotes even if we don't agree with the idea it tells about.
It's really wise. Many men - many minds, but if it's well-done, or the idea is rather interesting, we should support it even if we don't agree with it.

The echo-chamber effect is a very big problem in many social media sites today, the technology that is supposed to bring us closer is sometimes doing the opposite - bringing us apart, because we only get to see the like-minded.

I'm quite concerned about Steem, at one hand everyone wants to be friends here, I think people are a bit more polite than on other social medias. That's a good thing - too much time and energy is consumed on flame-wars in social media, it's a good thing if people will think twice before posting, trying to be polite and friendly even when disagreeing.

At the other hand, I believe quite much disagreement here on Steem is simply swept under the carpet, because that's easier than to attack ideas one doesn't subscribe to. It's usually easier to skip reading an article than to write counter-arguments - especially as one risks losing upvotes from that whale by flagging that one disagrees with him.

I think it's important to write back and comment when disagreeing, albeit in a polite and humble manner.