Uh, maintenance is one thing where ICE wins (until very recently, thanks fucktards in car industry). Cars have been generally very easy to work on, with anyone with a toolbox being able to do most their repairs in a shed
That's a user-hostile feature, not a property of electric engines. An electric car has far simpler mechanical parts, and the circuitry isn't very complicated either. It could be made incredibly easy to repair, modify, and upgrade, mostly at home even, if they designed them that way
This isn't a function of the engine though right? Electric engines are inherently simpler and should therefore be easier to maintain (putting aside company fuckery)
High voltage is scary as fuck, but also the fact that absolutely everything from doors to gas pedal and chairs are controlled by a computer you need specialized proprietary equipment to investigate.
This is an issue with new ice cars too to be honest
EVs have a High voltage disconnect. I repaired my EV(inverter) with normal hand tools in my garage. I did have to buy a license and tool for flashing the firmware, but this is a problem in nearly every new vehicle, gas or electric.