That someone can believe with absolute certainty that something will fail...
Certainly do.
Well when an electric A380 with 450 PAX flies to Hong Kong I will say "you were right" however as I am on that BA flight next month I will stick to an oil burner for now.
Unfortunately a lot of this electric aeroplane hype is too tangled up trying to compare car/bus/truck elec technology without accepting the harsh realities of leaving the ground with a stack of battery's. There are no lay-bys or hard shoulders..
Just taking into account the amount of chemical energy in hundreds of ton's of avtur then translate to storage capacity of battery's no matter how good Mr Tesla can make them, is going to let you fly with dozens let alone hundreds of other pax.