Why is CRISPR against colorblindness taking so long to reach the market?

Uhh… cause using a gene-editing technology to artificially reduce natural genetic diversity in humans for monetary gain without years and years of clinical trials might, just might, have some serious ethical hurdles in front of it?

because nobody wants to pay for it

Other applications are vastly more valuable. 'Curing' colorblindness has to be one of the least useful applications of this new, expensive, and mostly untested tech.