What made the 180/200 haste dagger so great is that it opened up a ring slot, but the 150 dagger doesn't give that option which is why people would rather just go with the axe, warriors and rogues alike.
Rupture is a very good skill no matter what mob you are going against...
Also I don't think anyone gave a clear explanation as to why the bounty dagger is so much better than the axe. Also doesn't make sense when I see 95% of warriors at that level using offhand axes and even a good amount of rogues using the axe over the dagger. I used an axe the entire time and not once was I disappointed about the amount of dmg I was dealing (was actually pretty op).
I know piercing damage is pretty popular at endgame because of lures and stuff but at the lower levels I don't think pierce damage really matters, even if there is a multiplier to it. People want that extra 150 str and that 300 heat dmg isn't all that bad aswell as the resist it gives
Now in theory, I believe the axe was made to be better than the dagger which is why daggers always have a special perk such as regens or a haste boost... just a theory so don't attack it with info I don't really care about
The ones that go with axe are the ones that look at the strength stat and elemental damage and don't understand how much damage is amplified with the dagger based on strength stat. Many players without understanding pierce/crush/slash with strength modifiers look at the axe and go "oh wow 150 strength and 300 damage is awesome. that dagger with 30 pierce (or whatever it is) is such low damage." It's the same with the quivers that have the elemental damage instead of the pierce which seems low but you equip both and compare and often the pierce dmg quiver gives a huge amount of damage over the elemental quiver.
Rupture is a good skill. But there are mobs where it takes me less time to kill them without casting rupture than with casting rupture. With many 2* and 3* mobs, if I hit shatter, pummel, double attack, and land another auto it's almost dead and it would take longer to cast rupture than to just whack it once or twice more and it's dead. Rupture is sweet when pulling multiple mobs and you can use rupture to accumulate damage on one while destroying 2 others.
Here's the thing - you don't think pierce damage matters. But it does. And this has been repeated by several players. If you'll read through the thread again, agent K and saladin gave good explanations on why the dagger is better. And I already explained why you see a large number of warriors running around with axes. Joe Bob sees Susie Smith and Bobby Allen running around with an axe and assume that's what they should get. They disregard the dagger because it appears to have low damage and go straight for the axe.
I think this thread has run it's course, and you're going to keep believing what you choose to believe regardless of how many other players that have leveled up warriors are telling you that have used both a dagger and a an axe at level 150/180/200. Again, I'd just tell the OP to see if he can borrow both weapons and make up his own mind which he prefers more.