It doesn't matter because it's a typical dishonest Creationist quote mine.
YECs Misquoting Hebrew Scholars on the Genesis Interpretation
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There is another portion of the letter that they “neglected” to quote where Barr clarifies his position:
The only thing I would say to qualify this is that most professors may avoid much involvement in that sort of argument and so may not say much explicitly about it one way or the other. But I think what I say would represent their position correctly. However, you might find one or two people who would take the contrary point of view and are competent in the languages, in Assyriology, and so on: it’s really not so much a matter of technical linguistic competence, as of appreciation of the sort of text that Genesis is.
Notice Barr says that the conclusion he drew upon was “not so much a matter of technical linguistic competence,” which by itself demolishes the argument that the YECs are making that their interpretation is demanded by the Hebrew text itself; not to mention he adds that most of the professors would tend to avoid this issue not saying anything on the topic on one side or the other.