I mean, it was a shoe designed for skateboarding in like, 2003? It hasn't really been substantially updated since then except for the insole. Maybe it doesn't have to be for some people and they like it. In cutaway pics I see of it it doesn't look that thick and midsole isn't super massive by any means. Maybe it is the materials used that give you that feeling?
I had some Dunk Lows last year that I liked the performance of. I sold them because I can't reliably get them. I didn't like the tongue or heel collar area thickness of them, but they did feel a bit more flexible. I think my main gripe is that for $120+ I expect a bit more from a shoe myself. I see that Tiagos are $100-$110, but they have more support, more effective padding, and better board feel for me. People love Emerica G6, which are now $90-$100 but Emerica has put effort into their designs in the last 2 decades even when people get harsh on them.