Well that's only true if you want to invest in critical damage instead of attack. For mages the superior battlemage armor with Tier 4 mats can give you 48 Willpower and 14% Magic Defense with the armor arms and leg upgrades. For warriors the regular battlemaster armor has 8 Metal Utility slots, same as the warrior armor and legs, for about 48 Strength if you loot Hakkon Wintersbreath for his 22 Iced Dragon Bone and find the hidden Ice Dragon Bone loot elsewhere.
Every dps class ideally invests in criticals over attack%. For one, it's flat out more damage thanks to the mighty offense tonic. 100% free crit damage is the ultimate buff, and you only have access to it if you build crit. Because how much more efficient crit damage is to build, even mages prioritize it over attack%, even though they can't even use the mighty offense tonic.
48 strength is only 24 attack. This is paltry compared to dexterity which translates directly into crit damage at 1:1. At values over 50% crit chance, strength becomes suboptimal for warriors. And every dps class gets over 50% crit. Usually it's around 75% to 80. DW rogues get 50.
Secondly it's just more efficient. You get 1.75 more damage with material slots you fill with crit damage than you do with attack.
Basically, investing in crit is a foregone conclusion. It's just better damage. The best armor then is the superior prowler armor flat out, and that decreases armor variety within the game.