An person exploring topics would have to click into each and every project to determine if they’re interested in seeing a project.
At the moment the topic pages (and Explore pages) show only issues instead of a project description. People won’t care to look at issues if they don’t know what a project is about.
Basically it would be much more helpful to show project descriptions, and other info like dependent projects, languages used, contributors, etc, would also be more useful than issues. Issues are something someone wants to see when they care about a project, not when exploring for new projects.