I am drawn to the aesthetics of traditional knives, but for me the lightning fast deployment of a modern one hand clipped folder is the drawing card. When I want to cut something, I don't want to go digging around in the bottom of my pocket looking for my Baby Butterbean. I carry a lot of EDC stuff in my pockets, and a traditional folder gets lost among it. A Delica 4 will be right there where I can find it and use it.
As for these guys who carry a big, heavy sharpened pry bar type knife, I think they do it because they have churning testosterone and its fun to carry a huge knife. This is the tattoo generation looking for significance, and carrying a big, heavy knife plays into that. And I guess some guys actually do "need" a ZT0300, but I'm not sure why.
Bottom line for me though as to why I carry a "modern" tactical style folder is that is just quick and easy to access.