This is ocupying me lately, not related to Steemit but in general. I love to debate so if I had just friends whom I agree with how could I debate them? Debating is the best way for questioning you own ponits of view and learning new stuff.
What I experienced on Steemit is that different opinions can be seen as attacks so I prefer to keep them to myself and not comment at all and in other places expressing opinions can be seen as annoying and pushy so it's better to zip it. Silence is golden.