Why don’t u guys ever cheer for the underdogs during world cups?

If someone goes through the comments, it would be easy to notice, that there's so many people who are cheering for the strongest teams. On the contrary, I barely saw anyone cheer for Denmark, Korea, Iran, Croatia, Belgium, Uruguay, Ghana or Costa Rica. The majority of the fans cheer for Brazil, Argentina, England, France, Germany, Spain, etc. Any particular reason for that? I think the smaller teams deserve a lot of respect for what they've achieved and they usually go unnoticed. Feel free to comment . Any opinion is appreciated .