I think it's important to get the full picture on how people think about ideas because ideas can be both wanted and unwanted. By only representing the amount of people who want an idea you're only seeing half the statistics. Imagine you had someone post an idea for knife throwing. You may get 5000+ votes for that from everyone in the knife throwing community - but world wide there are 10billion people who are against it. If you never knew about the 10billion downvotes how would you even understand the full story.