Filling up recent changes means we may miss important edits that a user has made which Admins may need to look at. Also, it just isn't efficient to message every user on the wiki to partake in polls or to go into a chat room.
Okay. I'm sorry for flooding the whole Recent Activity and telling everyone to go to Officer Squidward's Wiki Chat, Spongebob456. I promise I won't flood and advertise again. I want to be a good admin this time. :)