Let’s say I decide to go to a nice restaurant for a meal. The dish comes out, and I ask for a salt shaker before I even taste it (I never have, btw). That is normally considered an insult to the chef or you are pegged as a neanderthal diner.
Why, then, is it normal for a waiter to offer you grinds of pepper all over your plate before you have even had your first bite?
I think it’s because chefs are taught that there is a “right” amount of salt that they need to master.
On the other hand there is no “right” amount of spices (pepper it’s a spice) it’s more a personal and cultural difference.