Why do people justify that Kovu could have stayed Scar's son because irl lions mate with relatives

Like, this isnt a documentary

Even if they are lions and this happens in Nature, in TLK lions are sentient enough and act and think like Humans So Kiara and Kovu being cousins is still (excuse my terms) fucking creepy It's not just a genetic incompatibility thing it's a moral thing, im sure nobody here would date his cousin Also if Disney canonized Incest in TLK then it would ruin their reputation, which is also why they made a "Nala's Father" character in TLG, so that the "Simba and nala are half siblings" thing would finally be confirmed false