Why is Arthur reluctant to follow Gawain's advice?

Arthur is reluctant to follow Gawain's advice because he may see Gawain as less experienced or knowledgeable in the situation at hand. Additionally, Arthur may have his own perspective or plan in mind that differs from Gawain's advice. Lastly, there could be a sense of pride or ego involved that prevents Arthur from readily accepting and implementing Gawain's advice.