The answer to the question "Why do I have to wait 10 minutes before I can spend money I received?" in the FAQ of Bitcoin contains the sentence
"For example, if it takes miners 1 minute on average to learn about new blocks, and new blocks come every 10 minutes, then the overall network is wasting about 10% of its work."
But I couldn't get it... What I thought is that only one miner will be the creator the new block, so all the other miners who fail to be the creator have wasted their work. So the waste ratio of overall network should be huge.
Why am I wrong? Can you correct me? Thanks in advance!