Oh yes, I fully agree. My point, I guess, is more that not every tourist coming to Paris for the Olympic is an “extra” tourist, since some people who would otherwise go, won’t.
The question is also how many of them will come back to Paris once the games are over, who wouldn’t have, were it not for the games. If the olympics don’t result in additional tourists in the years following it, then it would seem unlikely it was economically worth it. That’s why I think it is fundamentally wrong to base whether you want to hold the Olympics based on expected economic returns.
I suppose “offering” might not be the right word, but I think the whole point is whether it is a waste of taxpayer money or not. As I wrote, I don’t think it makes sense to expect a worthwhile economic return from hosting the Olympics, but there is of course other types of “wealth” besides money. For example, if only money mattered a building should be built in as cheap a fashion as possible, but spending a bit more on making it beautiful is worth (to me at least) for the “wealth” it provides society in improving the beauty of our surroundings. I think the question becomes if it is worth the cost of hosting the Olympics, for the “wealth” of allowing the citizens of a country/city a chance of attending without travelling half way around the globe. Additionally there’s the “wealth” gained from the civic pride of having your country/city be the center of the world’s attention in a largely positive manner for the course of the games.