The counterargument to this is that Aedes aegypti form a small proportion of the mosquito population and ecological niche in general.
The larger concern is that mosquitoes bred by the same company are reaching adulthood and breeding new generations in greater numbers than projected[1][2]
[1] https://news.ycombinator.com/item?id=26929775
[2] https://gizmodo.com/genetically-modified-mosquitoes-are-bree...