Because most car brands and especially the dealership network make a lot of money with maintenance. The maintenance frequency and cost of my electric Audi is not much cheaper than my previous Diesel. It is a rip off. Only Tesla is more aggressive with longer intervals and they kind of communicate the cost savings in their ownership cost calculator.
> The maintenance frequency and cost of my electric Audi is not much cheaper than my previous Diesel. It is a rip off.
Then don't take it in for servicing if it's not needed. DIY the few things an electric car actually needs, or take it to an independent mechanic if you can't be bothered or lack the skills.