Are you serious about those fees? That's really shocking. It would be interesting to see a list of the universities that accepted their graduates (class of 2023). If academic standards are really high, most students should have been admitted to leading universities.
Those fees are in fact bit low depending on when a student enrolled at Lincoln! - though it is primarily only the Argentine families that pay this out of pocket, as Lincoln is the designated US State Department school (and the designated school for several other diplomatic entities and corporations) and thus the majority of families are not paying this out of pocket. Students who graduate from Lincoln do generally get accepted into their preferred universities in the US and Europe, including the Ivys, though this of course also depends on the effort/wealth of the student. Argentine students graduating from Lincoln tend to go to university in the States as well. Academic standards are high and it also provides substantial support/access for students with specific learning needs, including programs/services that simply are not available elsewhere in Argentina.