I'm on Yeonjun's side! I completely understand and am even sure that if I were Beomgyu, I would be as afraid as he is. BUT, considering how cruel the world was to Beomgyu, changing the laws will benefit more than just them. As Yeonjun said, they will build it. Future heirs will be able to more freely choose their love partner, who won't be hindered by status and other bullshit. Beomgyu has a chance to show people that omegas like him deserve happiness. (I used a translator, forgive any mistakes)