This is absolutely a legitimate concern. Playing like he did last week every single game is not sustainable for the future. He IS going to get hurt. He IS going to wear down physically. They have been running him balls-to-the-wall for a few years now because he'd prefer to allocate resources to the defense, and it's only a matter of time before we look up and realize that Allen is completely spent.
This may need a ***HOMER ALERT***, but I'm 40, have been watching football since I was like 6, and I'm pretty sure that, in a vacuum, he's the best all-around player I've ever watched.
We won because Murray inexplicably missed a wide-open Harrison for a sure TD and because Ingraham thankfully wasn't called for PI on the last Arizona play. It's not like McDermott's strategy over the last three minutes was integral to success.
I thought they should've gone for it, but it was clear that McDermott was playing for three, which I thought was the more egregious decision in that scenario.