That is fine. We don't expect our members to be active 24/7. That is why most of our projects rely on the person to take initiative when they have the opportunity to.
In this case, it is better to focus on quality of the comment given, than how many you comment on. Better for you to make one constructive comment, than spend not as much effort making ten comments.
The benefit of having such a large group like this is that we don't pursue (or persecute) people. We simply can't, just because we are so big... but even if we were small, we still wouldn't. The project wouldn't be here today if our mission was to force people.