I don't drink because of a medication I take and I miss beer with certain types of food. For so long the best available was beer flavored water. It makes me so happy that I now have a wide range to choose from.
Drinking an entire 6-pack of 0.5% beer is equivalent of drinking 6oz of a "normal" 6% beer. And I suspect people who drink non-alcoholic beer generally don't binge drink them. But I guess it may be important if you really can't drink any alcohol at all. But there are also beers labeled as truly 0.0%, not just "less than 0.5%"
The only good-ish citation for alcohol content in OJ I could find is https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5421578/ which found 0.16–0.73 g/L ethanol content in OJ (but with low sample size, so...). To 1 sig-fig, ethanol has a density of 0.8 g/cm³, so that comes out to an ABV of 0.02%–0.09%; much lower than 0.5%.