Riiight. Go for broke when you're tied for the lead. Brilliant strategy. Just fire a long club at a target as big as my bathmat. Especially when your opponent has been balky on the greens the last few holes.
(That was sarcasm, in case you couldn't tell.)
Seriously, to shoot at the island in that situation would have been a confession of weakness: that Paula doesn't think she can beat Annika without pulling off lucky shots.
I never heard of any golfer winning consistently by 20 shots against any sort of competent opposition. Whatever.
And, no, I strongly expect others to win when Ochoa doesn't play. And even when she does, sometimes.