Originally Posted by Vengeance
Because Minato was bitch made. Tobirama displayed his dominance over Hiruzen & Minato while Hashirama displayed his dominance over Tobirama. Hashirama then goes on to praise Hiruzen for such a talented pupil while Hiruzen was all gun hoe with entering the battlefield. Minato just stood around like wow these guys are strong. Totally exposed & bitch made.
That has more do with their personalities than power. Tobirama's temper is pretty similar to Sakura, but she isn't stronger than Naruto or Kakashi. Minato and Hiruzen are simply far more mellow individuals which has been shown many times in the past. Neither character has ever even demonstrated anger demonstrate and furthermore, Minato believes Naruto can handle it. That's why he gave him that power in the first place and watching the kid beatdown a Rinnegan user kinda helps.