Well, if you're down by 35 and it's 4th quarter...and your offense hasn't done jack all day...I guess miracles can happen but let's assume that 12 minutes remained...you need 5 scores so that's an average of 2.4 minutes per score (including the time that the opposing offense has with the ball - can your already abused defense put up 5 three and outs in a row?). Possible? Sure, if the offense is working...
The other thing you have to consider is that Hamler gets hurt on the return in what is a very low-percentage and probably futile effort. I won't discuss the possibility of Hamler fumbling or a muffed catch because, well, you're down 35 anyway, what's another gift to the opposing team, right?
I'm not sure what's the correct call in that situation (arguments can be made both ways, as always) but to me the negatives of a return vs. having good field position definitely outweight the positives at that point in the game. IDK, what had PSU done return-wise previously in the game?