The majority of benefits you mention are absolutely not applicable to the majority of travelers, specifically those only visiting countries for a short time in

The majority of benefits you mention are absolutely not applicable to the majority of travelers, specifically those only visiting countries for a short time in areas designed for tourists. Also doesn't take into account repeat tourists (e.g. masses in North/West Europe going south by plane every summer). There's a humongous difference between your average Ibiza tourist and someone visiting Asia to study the culture. From experience, the majority is far closer to the former than the latter.