This quote from the article highlights the attitude involved here. It is very sad. I didn't realize that Delta FA's aren't union but I can bet the FA in question didn't vote for that.

"Don’t use the call button to ask for a drink,” Sara Nelson, the international president of the Association of Flight Attendants told TPG. “As a general rule, don’t think of the call button as your vodka-tonic button.” Nelson explained that it’s “not intended to be for ordering drinks."