It doesn't surprise me, given that the grandmother has a lot of other interests and it clearly isn't every minute that she's saying crap like this. But I think people have put up with it longer than they would have if she were also generally no fun to be around, and a lot of patterns have gotten set which are now harder to break. I think it is possible that the part of the response where Lizzy gives LW an actual script to use is not that bad, but the guilt-trip around it, ugh.