Forget fuel efficiency and planet-saving for a minute.
Hybrids give you an OPTION. We should be optimizing hybrids so they can run just as efficiently on gasoline OR electricity.
If gas prices are up, just drive the car with 75% electricity. If electric is climbing, drive it with 75% gas.
I realize that's an oversimplification, but consider that the government WANTS you dependent on electric cars - that they can switch off with a flick of the wrist. Just look at California with their rolling blackouts, or the over-panicked response to Covid-19.
It should be painfully obvious that the government would LOVE to control our movement. A true gas/electric hybrid that can run fully on either system is a great option for the public.