You'll probably get some ignorant handwavy twaddle about it.
Fact is, for you, at this point, it doesn't matter if it's set at 14.6, 16, or 20.
It's like driving a gocart on the highway, doesn't matter if you're on a road that's max speed of 40, 55, 60, 70 or more... the thing you're on won't go over 35.
Think of the pressure the machine is raising to as the gocart, and the max setting as the highway speed limit... *it just doesn't matter*.