`find` isn't a Bash built-in and has basically nothing to do with Bash as a language. Not knowing `find` is a basic Unix literacy issue, not a Bash language footgun.

You're right that Bash is full of footguns, especially around quoting. And you're also right that that issue is even worse— and I think it's somewhat representative. Some of the cited Bash footguns are also about general lack of familiarity with CLI conventions and stringly typed data generally, like the dirname quoting issue.