APM ranges change the whole game. If you have low APM - one kind of units are superior. When APM get's higher - another unit might become superior.

That is also why amateur players copying pro-players can loose to a "weaker" unit combinations. Because when you do things at 50 actions per minute you will not get the advantages of certain unit types.

In the context of AlphaStar it was clearly visible in its first games. The AI chose ranged units and every commentator during that game was saying that AI has an inferior army. However when within the battle its APM were allowed to reach 1000 that type of unit became the best possible unit to have.