The phrase "plays to gallery" refers to the act of performing or behaving in a way that is aimed at pleasing a particular group or audience, often at the expense of substance or authenticity. Antonyms for this phrase could include "sincere," "genuine," "authentic," "honest," "substantial," and "profound." These words suggest an intention to communicate a message or express oneself honestly, rather than pandering to or manipulating an audience. Other antonyms might include "insightful," "thoughtful," "probing," "meaningful," and "nuanced," which imply a depth of understanding that goes beyond superficial gestures or grandstanding. By using these antonyms, one could suggest the importance of honesty and truthfulness in communication, rather than mere showmanship.