That is true. Due to the typical weak reverse strike, any wear there makes the coin looks more worn that it really is. But there is clearly a good bit of wear on the OP's obverse. Here are my Woods Hibernia Farthing and Halfpenny, graded AU-50 and AU-58 respectively. Note that these obverses are stronger and less worn than the obverse on the OP's coin and the reverses are also stronger. Hence, I voted XF-45 which I think is the correct grade. Although, as we all know, graders sometimes disagree with us.
@ddddd is the winner, with honorary mention to @johnmilton! Everyone else’s estimates were two or more grades low. I think @johnmilton’s assessment regarding striking is correct. In hand the coin looks very lightly circulated, with extremely crisp lettering and a bit of luster under the chocolate brown surfaces. I suspect it may have gotten a bump for eye appeal as well.
I looked through some completed sales and there’s a pretty wide range of strike quality for this issue. Both of yours are on the better end. Here’s a couple I saw on the lower end, both graded by NGC as AU55. Also I haven’t even begun to try to attribute mine, and am sure that some of the varieties and die states come with more detail than others. Based on completed sales I got my coin for a low price. If it had been “all there” in terms of both strike and surfaces it probably would have cost more and may have been graded 58 or even MS.