A few things to that, as Africaida stated, there is the simple part regarding money from tourism, should they get special treatment, no, but here's the deal. Considering, if you have read the news in La R.D. or just read some of the posts here on DR1, how many "Gringos" have died there over the last few months??
As I am sure you know, these things hit places like CNN and other National media based on the Country of Origin of the deceased, how many bodies before the government makes a stance and posts that they advise AGAINST going to a country?
I am fairly confident the DR Gov. doesn't want that sort of publicity and would much prefer the soft sand, palm trees and Piña Colada's that is outlined in the brochures, in peoples minds, and not whether its safe to go there.
Take Mexico for example, all the murders by Drug Cartels throughout the Country has been in the news FOR YEARS, and I know MANY Canadians who wont go there, myself included, the last thing DR wants is one of these posted:
https://travel.gc.ca/destinations/mexico
It's not just drunkenness that gets a Gringo killed, and tying into what Seamonkey wrote, yes, people should exercise some common sense and logic, but not everyone possesses a high level of logic, "Common sense" is a misnomer.