I don't think that you have taken a new car apart lately!
Gone are the old days of a few wires and a carburettor - now everything is digital electronic
New IC cars are insanely complex! - much more so than EV's
But also insanely reliable !!...due to being developed progressively over many years, one component at a time, with proven reliability.
Most new EVs are totally new designs, often with new technology and multiple components from different suppliers used in unproven combinations.
Sure , modern ICEs are complex and a sensor failure may throw up a warning light and send you for an expensive service fix, but i suspect there are a multiple more sensors etc in an all electical system that will shut down the system and disable the vehicle.
Have you seen the issues with Teslas power control unit in the Roadsters,..
Insulation breakdown of the thermal transfer material causing many of them to just "brick" without warning, leading to long, expensive major replacement, if the parts can be sourced (component stock-out situation !)
No, as i said, you cannot convince me a commercial EV is any more reliable than a modern ICE......let alone a diesel LandRover !
