As others have posted, in the current gear environment, stacking enmity does not force you to choose between keeping hate or taking less damage. In terms of end game comparisons in gear, you must consider best in slot. Right now that's the HDL set and enmity accessories. Combined with a nice sword and waist, one can attain over 250 enmity bonus, adding heaps more enmity per action. That is how we tanks keep up with the DPS classes.

Furthermore both tanks (war and pld) have enmity through damage. Sentinel provides a bonus in enmity to damage dealt for both jobs. Antagonize helps warriors further. Both also have a combo with enmity multipliers and pld's is much larger to off-set some of its shortcomings. All in all it's not perfect but it will likely never be.

Asking to abolish a tank-specific stat just because you don't like it or think it pigeonholes a tank into X gear is short-sighted. You're asking them to change fundamental portions of combat, and one that, if removed (said gear/bonus), would literally make the game unplayable unless further alteration was done.