Spending all your time on dailies to get minimal upgrades will hold your guild back more than if you spent that time working on being a better player/using better strategies. It's all about priorities. If you have time to do everything, then that is great. But not everyone does. And telling people to blindly spend their time maxing out their gear is not good direction to give.
Gear is important. But if you spend more time on gear than you do on being a better player or working better strats - then you are prioritizing the wrong things.