ICE cars are inherently more complex than EV cars, much like a Swiss army knife is inherently more complex than a kitchen knife.

If EVs quality will degrade to the quality of current ICE cars, that would mean that production if EV cars will use less resources, not more. It will not have to repeat the ICEs' complexity.

But frankly popular EV cars like Tesla are often considered sub-par compared to modern ICE cars with regard of build quality. They are used despite these shortcomings, and will actually need to rise tp the quality level of e.g. ICE Toyota cars.