The question is in what case does somebody avoid booking a trip that they otherwise would’ve taken because they just can’t stomach the tourist taxes once they’r

The question is in what case does somebody avoid booking a trip that they otherwise would’ve taken because they just can’t stomach the tourist taxes once they’re already paying hundreds for flights and lodging? Marginal customers always exist. If you raise prices by a small amount, most customers will ignore it, but a small percentage won't. That's why the thing you bought for $X didn't cost $(X*1.01) instead.