Barbs are so lucky to have that "armor from vit" trait. Basically they can stack str/vit/all res all day with a couple "life on hit / attack speed / crit rate" as icing on the cake and face tank half of anything. 60-100k hp on barb isnt even hard to achieve with a reasonably low gold influx, while still maintaining respectable DPS. Add in 2-3 abilities that give barb +%hp regen over time and there's no reason I can see someone buying hardcore items (unless they're impatient or don't know the value of money).
I think your avatars are making me a yoruichi fan and I don't even enjoy the show :/