Did you read my post? Did you try to comprehend those numbers?
It's more important to use a good wallet (with a non-flawed RNG) and make sure your private key/seed doesn't get stolen in any way (including saving on a potential online medium, virusses, malware, fake wallets, phishing,..) than it is to split up your unspent outputs... Really... If you're not afraid of dying due to a meteorite after being hit by lightning, you defenately should not be afraid of somebody guessing your private key... Be afraid that somebody STEALS your wallet file, or STEALS your seed/pk, don't be afraid that somebody GUESSES your private key.

By splitting up, you can decrease the odds of somebody STEALING your wallet/seed/pk IF (and only IF) you use different devices and wallet to generate those seeds/keys and never store them in the same place...