Originally Posted by Míley Dyrus
You can easily carry by playing support, especially since your average player hates it. By giving your team a support who actually knows how to play his role and enjoys it, your odds at winning shoot up drastically.
Want proof? Look at Taric and Janna's winrates.
Supports typically decide bot lanes' fate, generally being a greater factor than the carry. Later, as most people hate warding, a support who is able to ward enough coverage without getting caught can be invaluable to a team, allowing them to catch the enemy in bad spots.