Tourists are returning and, little by little, in establishments in Barcelona near monuments or promenades there are already terraces with non-native consumers.
What these tourists ask the waiters for (after having scanned the corresponding QR code) is usually what they believe to be typical. They go to Athens and ask for Greek salad, I suppose, and they come to Barcelona and ask for paella and sangria. Perhaps beer. None of them will order a glass of wine or cava in these places. Nothing is more "from here" than wine and cava. Why don't they ask for it?
Firstly, because it is not offered to them. Beer does not spoil. Cava or wine, if you have it uncorked for too many days, does. In many of these establishments, ordering wine or cava is an eccentricity. If you ask the waiter "do you have wine?" he will look at you as if you were a drunk. He will reluctantly say yes (you have broken his routine) and when you ask him "which one" he will say "a reserva". If you dare to accept the exposed reserva (who knows if "Viña Úlcera without vintage"), he won't know what to charge you.
Secondly, because of the glasses. The tourist might, if they saw that on the menu of an establishment on La Rambla there was wine or cava by the glass, perhaps order it, but if they understand that it will be brought to them in a thick, opaque glass due to repeated washing, they will spare themselves the ordeal. For gin and tonics they have glasses they consider correct, for beer they have glasses they consider correct, for soft drinks they have glasses they consider correct, but for wine and cava, no.
In the center of large cities, like London, you see how young and not so young people, with enviable naturalness, have a glass of wine on the terraces. They may not be drinking anything wonderful, but they taste decent wines in decent glasses. I am sure that half of the tourists (also native visitors) if they had the possibility of drinking beer, but also white wine in a nice glass (glasses act as the amplifier in a concert) would choose white wine. I am not complaining about beer, which I also like. I am just surprised that in Barcelona, the capital of such an important wine country, where some of the best wines in the world are made (it is no exaggeration), wine is left aside.
I once went to a cider house in Asturias. We were a few tourists. They poured the cider with a professionalism that left me speechless. I understood that in that place, no matter how many tourists filled it, a bad cider pourer would be fired on the spot. The cider was a local product, well-treated, and, therefore, like all good and authentic things, exportable. They would never have allowed that cider house to become a place only for tourists where it doesn't matter how it's poured, because, after all, they'll never come back. I say this for wine and cava and also for bread with tomato.