No it's just energy density. Hydrocarbon fuels have more. There's also the benefit that getting lighter as you expend fuel increases range (batteries don't mean

No it's just energy density. Hydrocarbon fuels have more. There's also the benefit that getting lighter as you expend fuel increases range (batteries don't meaningfully change mass when they discharge). Nothing about electric powertrains causes any problems here: it's just hydrocarbon fuel is more energy dense. It's not inconceivable you could build a hybrid electric aircraft if a suitably high power hydrocarbon fuel cell was developed, since removing the combustion stages from a jet engine would simplify the design considerably.