I have the same question. It makes sense to work hard and ensure of the tie and earn your place, but when it gets to minute 92 and everyone involved qualifies if you just pass the ball among the back four, scoring just seems unnecessary.
It is also nonsensical how easy Mexico's path is. They win 2 of 10 and live. Egypt wins 7 out of 8 and dies
Those players on the pitch for USA aren't first choice, they're all fighting for any available spots in the squad next year. Any good impression made can count.