Synthetic, post-space age, tech materials were widely available and popular, but professionals preferred the feel of classic leather gloves. You could quote the benefits of climate optimized, strategically ventilated, second skin hand feel all day, but unless you’ve been out in the field, doing collections, or VIP babysitting, things like the human cheekbone, or the handle of a serrated progressive knife just felt different against leather. Also, they’d never cop to it because it would go against their icy exterior, but I think for the pros, there’s an aesthetic quality to leather too.