It's been several years at this point, but I used to be a cloud support engineer for AWS (i.e. the first line of defense against support tickets). We were trained to always be kind to the customer, even if we're frustrated with them, so a response like "please read how the lambda works" probably would've gotten me reprimanded. Customers can rate your response from one to five stars, and if I remember correctly, anything less than four required a written explanation to your manager as to what went wrong.

That job was a glorified call center; I didn't last very long.