Replying to What am I supposed to say to this guy?

So today I went to my local sports store to pick up a dope pair of skis for a great price. Im 6ft tall so I went for 179s as they are twin tipped and I primarily ski the park. The “ski professional” was trying to dissuade me from buying those skis because he says that pro skiers that ride Slopestyle and park have skis up to their chests and that the 179s are too long for me. I don’t believe this for a second. For example, Henrik Harlaut’s skis are like 10cm above his head. Is this guy right or am I? Im honestly confused at this point as I got skis that match my height almost perfectly.