That is a good question, Ezer!
I once considered to give readers the option to be a woman/man MC, but there are a couple of things I considered:
1.) I don't know how to program it 😅 I also don't know how the codes work with grammar (if MC is woman will use 'she', if man will use 'he').
2.) a man and woman will have different reactions so the codes, again, will be more complicated (from what I know, a man will have more logic based choices, while a woman will often go with her heart/emotion-based choices).
3.) the romance options will also be affected since the MC can be female/male. I imagine there will be at least 1 female love interest. Now don't get me wrong, I respect LGBT, but I prefer making male love interests 💖
4.) the CGs will also be more complicated since this means I will need to make 2 versions each (1 for male MC & 1 for female MC). That is too much work for me as a solo gamedev Q_Q
With all those things considered, I chose to stay making female MC and I don't think it'll change >_<; thanks for asking though!