Is there some user interface guideline that explains this? It's been that way for years. Because that's not a common way to label a button. Imagine "Need to ad

Is there some user interface guideline that explains this? It's been that way for years. Because that's not a common way to label a button. Imagine "Need to add your comment?" or "Need to Upload a file?" or "Need to Send an email?" everywhere. Is there some guideline at work here or is it just a whimsical designer and no one corrected it? I'm genuinely curious, not trying to make fun of them.