The Jewish people, the Israelites, have important duties they must uphold toward Noahides—treating them with honesty and love. This requires identification, which is why the acceptance of the commandments takes place before a court.
Just as any person who becomes a citizen of any country accepts that country’s laws, whether they are to their advantage or not, a person who wants to become a Noahide and accept that status also accepts the binding nature of this constitution, even before they decide to observe its commandments.