Replacing shipped blueberries with locally farmed ones definitely could be a wash or a loss, environmentally, for sure I agree there. But we have relatively efficient industrial scale farming in the US as well, if we admitted that blueberries are seasonal we could grow them in big efficient farms and then just ship them less far.
A lot of fruits freeze pretty well too. When I'm in Maine at the right time of year and big boxes of "wild" local (low-bush) blueberries are for sale, often they're already frozen. I agree that local fruits during their short local season can be pretty good but stuff that's shipped in or frozen isn't necessarily bad. Depends on the produce.
