It's safe to say Pochettino wanted to remind everyone he's in charge of the USMNT. Not Pulisic. Asked about Pulisic's comments to CBS Sports — he revealed he said he could play in the friendly games against Turkiye and Switzerland but not for the Gold Cup,

U.S. coach Mauricio Pochettino says he wouldn’t allow Christian Pulisic to dictate which games he would be available for, explaining why he rejected the star’s offer to play in a pair of friendlies ahead of the CONCACAF Gold Cup but not the tournament itself.

The USMNT manager in no uncertain terms emphasized the team over the individual in a loud rebuke to his star player.