That's cool!
In previous studies "The bipaternal mice exhibited developmental disorders, including craniofacial deformities, where their facial width-to-length ratio was broader compared to normal mice" and "difficulty suckling", with only 12% survival rate at birth. Their approach alleviates both those defects, "however, the mice still exhibited behavioral abnormalities, such as a tendency to enter the center of an open-field test, which is contrary to the instinctive behavior of rodents". A previous 2023 japanese study did something similar using skin stemcell and relying more heavily on genome editing.
Two main benefits outlined in this Reuters article going a bit more in depth seem to be around regenerative medicine and potentially a later method "for producing offspring through unisexual reproduction" for endangered species.
I wouldn't expect anyone to deny the existence of corruption or abuse of power, but I think the corrupting influence of power is often used to justify in retrospect the acts of people put into power to do exactly that. It might sound pedantic to say that CEOs or state officials aren't really "corrupt", because they rarely ever intend to represent the interests of the workforce or population, but really it's a total inversion of causality. They don't "betray" because they got in power, they got in power to "betray".
On an interesting sidenote, it also goes against the common misconception that any form of authority ultimately leads to corruption, since those same CEOs and officials seem to stay pretty loyal.