Bosch is famous for being anti-right to repair. To work on their E-Bikes you need a certification and a special tool set. Probably the primary feature of these brake systems for Bosch is locking end users into Bosch certified maintainers and parts.
It costs $700 to change a dead battery on some Mercedes cars because the onboard computer has to be reset using special electronic tools.
This "screw the customer" approach is the road to self destruction. Just ask Volkswagen.
I can't find a citation, but I recall seeing an estimate that the German automaker cartel increased prices on the order of $10k per vehicle. I had also read that there is a similar cartel among the automotive suppliers, none of whom seem capable of making a windshield wiper set that isn't hundreds of dollars, or a vehicle lighting below multiple thousands of dollars.
“People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices.” -- Adam Smith
https://www.spiegel.de/international/germany/the-cartel-coll...
Talking to the onboard computer is free beyond the initial equipment and it isn't even locked or anything, tools that can do this can be had for cheap, connect to your phone via bluetooth etc.
You can buy dongles and do it yourself, but not everyone is willing to mess with coding their own vehicle.
Which only goes to prove that it didn't need to be and should never have been "a thing".