I'm not totally sure, but humans are better than our ancestors at basically every important job. It would be surprising if human brains were the pinnacle of computational power, and even if they were, digital brains could be run faster + copied.
Really? Are we better at composing epic poetry or building inspirational architecture? But perhaps you don't think those are relevant activities because they have minimal impact on how the world develops (unlike bombs and computers). If you think that I would encourage you to think again!