Maybe there should be a widget that biases for less dense areas or does it proportionally, but the results aren't necessarily wrong as-is. A 2M+ population city with 20 <special interest group> meetups on a given weekend doesn't have more proportional interest in the topic than a 200K+ city with 2 <special interest group> meetups, but it still has 10x the total amount of activities for a resident to go to. I guess it depends on if the person is trying to figure out the absolute amount of activities available to them or the extent to which that activity dominates the culture of the area. I'd personally want to use the tool to figure out the absolute value.