Because Kathy (who I did vote for as bootee in the 1st episode) has had time to grow on people in her tribe and she's got food and fire and a shelter now so she can relax and not be such a pushy broad.....Whereas Robert from day one has been a big NYC tatoo-man who has been "sickly", deprived of his protein (boo hoo), not exactly one of the tribe's big thinkers or doers....and now he gets HURT???
Boot him out of mercy or necessity; makes no nevermind. There are no Limos on the island and a sick/hurt/hungry male is excess baggage. Don't wait til he trips and falls into the fire!!!
Of course if Kathy IS the boot....I'm going to claim the same thing as Webby in his official pick (only in reverse).
Dalton
PS. While not necessary here; a truly great Summary like the one Swami wrote for E-2 deserves another YEAH BABE, WTG!!!