Exporting expensive light sweet oil and importing cheaper heavy sour, that our refineries are already optimized to use, keeps prices lower in the US.
Oil companies are really stupid. Now the low cost of crude makes people look away when they hear the US is exporting oil. (when not if)It goes back up to $100/bbl and the American people hear the the US is exporting oil it will be pitch fork and taorch time.
All things being equal, permitting that exchange is fine. Just lifting the ban on exports without that particular case being the specific exchange permitted doesn’t make sense as it works against energy independence.