I think you’ve got some mis-conceived ideas about how difficult it is to diagnose and repair an electric car. They are incredibly simple machines compared to their ICE counterparts.
There is very little to actually go wrong and they are very reliable. The cars that have been on the market the longest (Model S, Model 3, Leaf, Zoe, Ionic, Soul, e-golf etc.) are very well understood with a plentiful supply of first party, 3rd part and used parts.
They are easy to diagnose and problems on them in the rare case you get an issue. The routine maintenance is a complete doddle.
There is no taking half the engine bay apart to reach the spark plug on cylinder 6 because for the most part, under the bonnet is full of fresh air.
Why do you think they are difficult to maintain and repair DIY?