Like if you want bad weather alerts, you need to specifically define every situation of "bad weather" by givin exact weather / wind / rain limits.
What happens if it's cold, windy and rainy, but every value is juust 0.1 over the threshold of notifying you? It's still objectively shit weather.
Or can n8n go through your emails and check for promo codes or sales you're looking for - in ad mails that are 90% images with text?