That example was added in 2022. https://web.archive.org/web/20190903044149/https://dictionar...

You can clearly see that the prior use was very different.

Cambridge Dictionary just documents that it's in fact used that way. One may still disagree on whether it should be.

"That's not English" is usually prescriptive, rather than descriptive. And though English does not have a central authority, individuals are very much allowed to hold prescriptive beliefs - that is how language evolves.