He may be afraid of extracting too many tannis? I assure you this is not possible with the small amount in one kit. As when making wine from grapes you dont want to press to hard or you will extract too much of this and you will taste it in youtr wine and probably ruin thre whole batch. Its why some places keep the free run totally seperate and never blend and like I keep them seperate and blend at the end to taste to make sure you dont use too much if you accidentally do press to hard. When pressing yopu should keep a small glass of free run and taste it against your pressings and you willknow when your pressing to hard.