agreed. I would likely not come to San Pedro if it were served by any form of mass international transit.
The simple extra steps to get to San Pedro are just enough to keep away those with no desire to acquiesce to another culture and appreciate it for what it is.
I've seen the transformation of NW Costa Rica since the opening of the airport in Liberia. For Costa Rica, it's great because touristas can quickly spread to thousands of square miles from there and disappear into the culture. This is not possible in San Pedro due to its size and it would be destroyed.