I think the OP saw a lack of nuance in the argument and explaining was speculating about where that comes from. I don't think anyone suggested that the European way is better. In fact, your reading of the OP's argument is very "American" because you talk about "European" as if it's a thing. Drinking culture in Southern Europe is very different from drinking culture in Central Europe. Eastern Europe is another thing altogether. Hell, even the way Spaniards drink is vastly different from the way Italians do. Also, in general Europeans get really drunk occasionally, just like you do, so even if there was a "European" way of drinking it would include your behavior.
Basically, I think you're reading into it too much. I don't think the OP implied what you think he or she did.
>> I have noticed that, as I get older, I need to hydrate more and more to avoid a headache afterward. Annoying.
Drinking water only helps relieve one of the causes of a hangover (dehydration). There are many many others, so it may not be the amount of water you need to change, but your choice of drinks (clear, distilled beverages generally contain less congeners, which are one of the main causes of hangovers).
Basically, I think you're reading into it too much. I don't think the OP implied what you think he or she did.
>> I have noticed that, as I get older, I need to hydrate more and more to avoid a headache afterward. Annoying.
Drinking water only helps relieve one of the causes of a hangover (dehydration). There are many many others, so it may not be the amount of water you need to change, but your choice of drinks (clear, distilled beverages generally contain less congeners, which are one of the main causes of hangovers).