I’m actually really sad to see just how against a harem the author of this story seems to be, I don’t practice polygamy in real life but I’m a fan of the harem genre in stories and anime’s. Especially when they are done well and I think it could be done well in this story, that’s why it’s disappointing to see it, have no future in this story.
"That would be disrespectful toward love, toward Song Jia, and even toward women." many people of powerful family can has many "wife" and nobody say anything (not true wife legally but so what no like they need)
A kingdom with no hair is a weak kingdom. Im not commenting about harem or not. nor polygamy or monogamy or polyamory etc. but why would the people in the court have more respect for him. it should have no effect. (some maybe feel respect while others should fear for the future).
Personal opinion is that, whatever floats your boat. it's not disrespectful towards woman if the female counterparts agree to it. (this works both ways)