Not all 80 pitch games are the same.....Sometimes the kid needs a break, sometimes he doesn't. Baseball is very situational and good coaches understand this. Pitch counts alone do NOT take this into consideration.
Example:
4 innings 80 pitches - deep counts - lots of baserunners - lots of stress....Kid needs to sit/rest
7 innings 80 pitches - weak contact - 3up3down - cruising effortless...Kid can keep playing