Bankroll Theory

[RiverMise]

Ok. The 300BB rule generally states that you need 300 big bets to play the given stakes. What if I want to play 4 tables of those stakes. I assume the 300BB thing is per tables? However, I dont think you need 1200BB to play 4 tables because if you are better than most (or all) of your opponents then your overall variance will be lower with 4 tables. This is because you are playing 4x as many hands. SO, I would tend to argue that since the variance for 4 tables is lower than a single table... maybe even 300BB (or slightly above) for 4 tables would be OK?

Is my logic flawed?