It’s not a matter of the wrong choice of words. What he said was idiotic. It is indefensible. No other way to describe it.
And yes, it is a matter of the wrong choice of words and the wrong choice of topic.
The number of % of pregnancies that occur after violent rape is irrelevant to the issue of making it an exception to outlawing abortion.
He made a mistake, admitted it, and now it is time to move on.