Here is why, your friends might wonder what are you doing? Or you may want let them know how you are busy, what is your plans... It's up to you actually, if you dont want to share publicly it is possible to hide them with privacy settings.
After writing your todo's (and interacting with your followers of course), you may want to know what's popular in your neighborhood and continue with adding popular tasks to your list.
However, you're right. Flow that we used in the landing needs a quick fix. ;) Thank you.