Oh I do fight'em, I constantly fight'em. Thing is, I focus'em down because their burst damage is on par with mine. (Yes, I burst WAY harder than most sents / guardians (8k+ thundering blast and chain lightning, + 8k force lightning over 1.5s)), and they're easy as **** to shut down / kite. Learn to play, and you won't have issues with them.
Hell, I've even had my lightning strike crit 7k's (5.5k + 30%), and that's with a 1.3 cast time.