We don't mean "destroy 10%" when we use the word decimate anymore, I get it. Natural language, migration of meaning, subjective denotation etc.
https://www.merriam-webster.com/words-at-play/peruse-usage
The casual reading meaning, although not the original one, has been in use since the 1500's.
It always means "just looking around" whenever I hear anyone use it.
Would be interested to hear other's thoughts. Maybe MW should consider changing the order of their definitions.