My gripe is that "essential oil" is only slightly more specific than "chemical", so it's meaningless to talk about essential oils in general as a fix for anything. You need to evaluate them on a case-by-case basis for every use. An arbitrary essential oil is as likely to be a poison as a cure, but they're all lumped together in the hype. And it's not like we didn't already know that plants are a good source of medicines. /rant