User blog comment:Wario1226/Junglers as Supports/@comment-10958553-20130813183635/@comment-6301771-20130813215021

Bot lane isn't like top lane. An opponent being pushed out of lane without being killed is a huge risk, as that support gets access to more wards and their carry can come back with a vamp scepter and a berserker greaves that your carry WON'T have. In addition, a jungler who comes in and immediately pushes the tower down is frustrating bot lane because that makes farming more risky as the lane can get pushed waaaaaay out of any safe zone.