Is it okay to conceal the fact that I will play poker from a border officer?

I am preparing my trip to Vegas and found a 2021 travel guide published by WSOP. https://www.wsop.com/2021/WSOP-Travel-FA... On the last page of the document, it suggests that I should tell the officer that I am in Vegas "to participate in a live eSports tournament". I understand that there is no reason to give away unasked details, but technically this is not a true statement. Wouldn't this give them grounds to deny entry into the US should they become suspicious and scrutinize further? Any updates to the guide mentioned above?