The point is that the probability of attacking other level 6 units (except, of course, Cyclops) is much lower, as they have more health and damage. All of this, of course, has a huge impact on choosing the attack target, doesn't it? ;)

"Это нам идеально подходит!" [Новосибирск, 2013]
"Красавчик! Если только не читер.." [Киев, 2014]
"Это Вам не шутки - нажрался Dust в маршрутке" [Новокузнецк, 2015]
Сам ты фиш (с) :D