I think you've hit it right on the head there. The idea is communicating to someone you're giving feedback to is that you're invested in their success enough to want to improve it, and make it the best it can be, helps people - especially creative types - understand that even if you're telling them ways they can improve, it's coming from a positive frame of reference.
And thank you! I'm doing my best to offer feedback where it's wanted and just general help in many of my posts.