Bogus is rather a strong word.
I generally try to keep it short for time reasons and out of want to avoid tedious repetition. Sometime that makes it less clear than it could be.
The superior efficiency of the process from battery to wheel is quite well known and does indeed narrow the gap. A good way to picture the advantages of electronic drive compared to combustion one is to compare the three big component weights.
m = a + b + c
Overall mass is composed of engine + drive-train + energy storage. Per a given x of performance the electric approach is generally (far) lighter when it comes to engine and drive-train however much heavier in energy storage.
This is actually one of the big reasons why electric power and bikes or short ranged LEV fit so well. If the battery doesn't have to be that large the overall package will be lighter then the combustion option.
Long range ( and energy-intensive) vehicles suffer that they need a large and thus very heavy energy storage and in generally faster charging. Many military vehicles fall into that category.
My key point was that rechargeable batteries in vehicles (pure electric, hybrid) and off them will become much more attractive if 1) and 2) work out. An increasing share of military vehicles should profit from the ability to plug in, using distributed energy and more available faster charging from private and public sources.
This is a bit of a change from the generator theme seen in recent years largely due to conflicts in underdeveloped countries. Both views are obviously not mutually exclusive...
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