Google does the same. It wants the pages that it indexes to be original; if a page just copy pastes another page's content, its score is affected negatively or even de-indexed, they call it spam.

Google itself on the other hand does just this, for example Wikipedia text and lyrics are taken from other pages and copy pasted onto Google's page.

Try telling a "googler" this and theyll go "noooo but for Google it's different because Google has determined that's optimal and good for user experience". It's difficult to get someone to understand something when their paycheck depends on them not understanding it.