I love running content with a WAR. Only time it gets harder is when the WAR is taking 1k+ damage. Which is really only in Titan and coil. I think the stigma comes partially from people who just don't understand how WAR mechanics work.

I did a higher level dungeon with a DF WAR who kept dropping all his wrath stacks as soon as he hit 5 stacks even if he had almost full health. He also wasn't positioning the mobs in front of him. The healer was spamming to keep him up and would eventually pull hate. I made a few suggestions, and the healer who mains as paladin talked with him about some basic tanking. The warrior was very grateful for the suggestions and the difference was immense. I'm sure a lot of people would have just written it off as "warriors suck." With all the paladin cooldowns some basic tanking mistakes can be convered up where warriors are left exposed when making the same mistakes.