Maybe it's stressful to use a wallet with lots of satoshis? (whereas several with fewer satoshis is less stressful, isn't it?)
Honestly I think the amount of satoshis or Bitcoin in a wallet should not determine how many wallets should you use. Regardless of many or less, I think the safest choice is to distribute your money and not just store them in one place where it could serve as vulnerable. This one advantage far outweighs the possible other cons for me. If one wallet gets compromised and all my bitcoins are there, I would be bummed and that is what I am trying to avoid