Unfortunately, there are a lot of stupid people in this world so the car makers can't diable the warning sound for the situations, e.g., people leave kids, babies, pets, etc. inside of the car for a long period of time in the confined spaces, etc. Ever year there are unfortunately fatal incidents. As such, I believe that the car makers cannot diable the warning sound completely to prevent liability issues.
I hope that Jeep can give us an option for a less-annoying sound such as one beep rather than three honks.