economically speaking, we can say thad saudi arabia has a quite flourishing tourism industry.
And those are only responses to your selected sources. I could give a few aswell. Wiktionary: "The act of visiting another region or jurisdiction for a particular purpose" Tourism comes from tour which is "A journey (through a particular country)" Tourism is simply travelling to another place, sometimes for a specific goal ( a landmark you would like to see, or a pilgrimage) and sometimes just to enjoy yourself in another country.
If you are not convinced, just google: Is pilgrimage tourism. (in fact personally I think it is at the cradle of tourism, at first the main reason people travelled to other places that had religious significance)
Whether the travel is voluntary (for leisure/holiday) or involuntary (for business/religion), it all constitutes as travel and tourism.
And apparently 400k per month to Bali. That may well be mostly Australians, but does not necessarily mean lots of others go there.
Now makes sense.