That's not the problem - if such a technique worked (it's been attempted in mice [1,2]), two males could produce XX or XY offspring, as you get X sperms and Y sperms. The restriction would be on two females, they could only combine to make XX.
Men would get on average 1/3 daughters (XX) and 2/3 sons (XY and YX). The YY offspring would not be viable. Women would only get daughters.
We don't know what happens with YY, but yeah, at least a terrible syndrome.
The X chromosome codes quite a few crucial proteins [0], such as certain clotting factors (that's why women rarely get haemophilia), or retinal proteins (that's why women see more colors, and rarely get daltonism). It is pretty impossible for a fetus to develop with a YY genotype.