Who think Venice is important?
I do. I return as often as I can - annually before illness and covid
Of course, Venice is “important”, but what I mean is—
is it still considered a unique gem in the world that should not be missed if on the continent or do the negatives outweigh the positives these days in terms of crowds/ crime, etc.
I really don't think there is anywhere in the world like Venice. In my opinion it is unique. There are other water based cities in the world, for example in Thailand but nothing like Venice.
I haven't experienced or heard of any crime there - other than frequent crime in the Commissario Brunetti novels by Donna Leon, but even in the novels they don't involve tourists much; perhaps a glass furnace worker or the conductor of an opera. I am sure there is some crime, and the handbag sellers / umbrella sellers / rubber boots sellers / glow in the dark toy sellers (same people using the same sheets on the pavement and illegally selling what they think tourists need or want at the time) certainly are regularly moved on, and there must be some crime or there wouldn't be a real life Questura, but neither crime nor police are evident. It is fun actually as a tourist to see the emergency services (police, ambulance, fire) screaming down the Grand Canal with lights and sirens, and making the wakes that all other boats are forbidden to. Most definitely no fun at all for the victims or patients but that doesn't mean I don't look up and watch...
I think an 11 year old would enjoy all the stairs up and over the canals. With a few exceptions I think that virtually all the bridges, large and small, are unique. As far as the maze mentioned above I as an adult enjoy seeing how one bridge and passage will bring me around a different way than I am going. I would think that an 11 year would be in heaven. And then spotting all the different boats - you know that everything comes by boat and everything leaves by boat - like garbage boats, vegetable boats, hotel linen boats, luggage boats, repair boats, taxis, different types of public transportation, funeral boats, everything.
But you know your boy better than I.
Are there crowds? Yup. I don't like them either. I and other folks here have written extensively easy ways to avoid them. It is a wonderful spectacular city. I love it.