Once upon a time on a small island of 18,000, devoted to divers and little else, there existed a balance of taxis-to-customers. Most of this 18,000 live in the town and walked to their neighborhood tiendas and panaderias. Visiting divers stayed within walking distance of the town, since there were NO hotels way down south or way up north. To support the then few out-of-town hotels with workers, hotels operated their own buses/vans even carrying divers to the town for dinner. The was little need for many taxis. All was in harmony.
Then a great evil befell this land of harmony. An evil almost unspeakable: cruiseships. The first cruiseships were cautiously welcomed and had little effect on the general harmony of diver and local. But it was not to be, the cruiseships came in ever increasing numbers, discharging their cargos like pigs in a chute onto the land of harmony. The 18,000 were overwhelmed. Their taxis were no match for this great evil. To bring back the balance and harmony, a call when out far and wide. From all over Mexico they came to answer the call, they would help the 18,000, and reap their rewards; they who would be taxi drivers in the land of harmony! And so it was.
In time, these new taxis further upset the balance, but that's another story.