Consumers want protection from cars they can't afford to fix.
Insurance companies want protection from costly warranty repairs.
Mechanics want protection from cheap highly-integrated gatekept parts that they can't work on, and/or won't get paid as much for.
Said who ? If it's under warranty for long enough and cheap enough then I don't really care even if I have to fully replace it in 5 years and sell for scrap. Without tariffs that's what the price would be.
They may regret it when the battery dies and it's a $20k repair because they're actually structural components on those cars. Or a single $20 sensor dies that's part of a larger non-serviceable $5k component.
That's assuming it's out of warranty, which is now 150k miles or 8 years for BYD in the UK.
The largest other component is the integrated motor/inverter and they should be pretty reliable. They are still repairable, although you might need to replace the entire circuit boards, rather than individual components.
Everything is "repairable" it's just a matter of is it worth repairing. Maybe rebuilding the car every 5-10 years isn't that bad of a model.
Again, if they wanted to work in the interest of affordability and electric vehicle promotion, they would. They're being protectionist for Ford and GM.