Thank you for sharing your thought. It's really insightful post. After reading your post, I also thought about why I voted certain posts. It's not always investment for me. My upvotes have several meanings. "great post", "keep up the good work", "thanks for the info", "cheer up", "good point", and sometimes just "hello, nice to see you on steemit".
I totally agree with you about we should use our upvote wisely. I'll consider that when I'm upvoting posts in steemit. Thanks!