You are partially right, but not for the reason I think you think you are.
Any body / interior parts are essentially the same in an EV as in a ICE vehicle. Suspension / brakes / tires should be purchased new in any case. That leaves any work on the engine (yes, the EV also has an engine) and transmission. There simply aren't that many parts you need to replace. There is no transmission, no exhaust system, no air intake system. The Chevy Bolt EV engine has a total of 18 moving parts, and that includes every ball in the bearings. (very in depth video about this amazing piece of engineering: https://www.youtube.com/watch?... )
Yes, you can still go to the junkyard to source a used door, interior panel or whatever. But the ICE maintenance you avoid by going there just isn't there in a EV. non-existant is better than cheaper, right?
Also; my Bolt is not online, and doesn't have to be. Any DRM/secret maintenance software companies will want to implement, they will also do for ICE vehicles. Why would you think there would be a difference here?