ok so i have always been told to pitch yeast at about 70. i was reading through a recipe and i noticed that it said to add yeast when the wort was 78 or lower. now the yeast temp range is 64-73. since this is the case, why would they tell you to pitch outside the range and warmer than normal? is there some benefit to doing this that i am unaware of? or any other reason for that matter?