User blog comment:Deshiba/Pre-Season Theor Craft: Twitch/@comment-5035765-20131219194735/@comment-8506165-20131221173856

Yes it is.

As most ranged champions your sole purpose is to deal more damage than you take. There are some exceptions, obviously, but as an ADC in a teamfight if you deal only 2000 damage to their whole team and take 2000 damage personally in return then you're not doing your job very well, for instance.

So 1% of the damage you deal should be much higher than 1% of the damage you take. Rare are the cases when as a squishy ranged target 1% increased damage is enough to kill you where otherwise you would have survived.