Mmmm, how much of the electric side is actually serviceable? I think you're confusing e-bikes with regular bikes. The electric side is probably entirely off limits to people and what you're experiencing is the vestigial aspects of the regular bike underneath.

As someone who own's a Tern GSD and a Tern Vektron too, I've found the unserviceable Bosch electric drivetrain to not be refreshingly serviceable at all.

This may have changed in year since I last had to look and might vary by region, but in US Bosch have been incredibly strict about parts and software tools for the motors - only approved dealers can order a brand new replacement motor, for example. You cannot order one as private individual easily (much like a Tesla...). That's unheard of for bike parts generally speaking.

For sure, all of the parts that are shared with traditional non e-bikes (group sets, brakes, wheels, etc etc) are still easily privately serviceable by end user. The Bosch electric drivetrain, not so much.

That's because it's a normal bike other than the motor itself.

Just make sure you don't short out those batteries.