In the heat of the moment, with something like home invasion, etc., I don't want to have to deal with removing an optic, even if it is quick release. Disregarding that, co-witnessing is a very popular method for having backup sights. There are dozens of online articles singing its praises.
CZ USA even states on their website that "The adjustable four aperture aluminum sights are updated to deliver lower 1/3 co-witness with popular red dots, providing a better sight picture and reliable backup."