Right but randomly posting in a link to Veblen good on Wikipedia because it's one example of when raising prices doesn't lower demand doesn't mean it's in any way relevant to this discussion. Almost no one would argue that this kind of travel is a Veblen good.
Right. And in some cases, that would be apt, but here it's not because travel is almost never a Veblen good.
> unqualified assertion that raising prices lowers demand
An inverse relationship between price and demand is normal. Veblen goods are noteworthy precisely because they are exceptional. The demand of assertion, then, should fall on the poster of the Wikipedia link.
There might not be a 1:1 relationship between the increase in price and decrease in demand but raise prices high enough and you limit who can possibly even afford it.
EDIT: It's not that simple. Raising prices doesn't magically lower demand in every scenario.