I mean, if you ignore cargo, sure. If you don't ignore it nor that more fuel is being burned by an average cargo flight (due to more weight compared to a commercial flight), it'd inconvenience everyone.
Expect cargo flight are responsible for a fraction of CO2 emissions from commercial aviation[1].
If you really want to push there are solutions:
Packages just take longer over sea (10-15 days) until we switch to an air ship (2-3) based transport system which doesn't have to pay so much energy of lifting.
I mean, if you ignore cargo, sure. If you don't ignore it nor that more fuel is being burned by an average cargo flight (due to more weight compared to a commercial flight), it'd inconvenience everyone.