Those who log issues are the hardcore users crowd that are bothered by something small, whereas new potential users that bounce because of something important generally don't bother making issues. You may be missing out on a lot of critical issues such as limited documentation and confusing API aspects by ignoring other channels of communication.
It's generally pretty easy to look at the tone of how recent issues are handled and know if the maintainer is drowning and would prefer that you keep the noise down, versus whether they're likely to feel energized by interacting with enthusiastic users.
You don't have to be hardcore to leave helpful feedback. If you think it's the latter, go file an issue.
