LAW reported adopting this measure due to the constant transfer of immigrants https://www.icihaiti.com/en/news-22289-icihaiti-flash-chilean-airline-law-resumes-flights.html refusing to be described as an "ethnic enterprise" LAW says it has always acted responsibly in Haiti, informing passengers of their duties, rights and documentation required to travel and stay in Chile "However, since massive declaration of inadmissibility of foreign citizens causes inconvenience for both the airport and the agencies that sold the tickets, we consider that this measure will help mitigate these effects..."
It seems likely that the company made this decision under the constraint of the Chilean Government...