The 2nd airbag can be disabled in the event small children are riding in rear facing car seats. This prevents the airbag from opening and killing the child by smashing him/her into the passenger seat.

Children that small should be in the back. It is the workaround for a bad situation (perhaps you have to transport 1 more kid than you back seat can handle and you don't like this one so much). This is also well understood and studied already.

There are commonalities between this and that. But in this situation wouldn't turning off assisted driving in its entirety be better.