>>10285868Shawn was smaller and as a heel needed to control matches and beat up his opponents. So Vince thinks to make it believable he needs a bigger manager to even the odds and give Shawn openings otherwise he can't realistically get the upper hand on guys like Taker or Vader.
Since Rude is already Shawn's manager while Shawn and Triple H are pushing to work together he just gets rolled into the act.
