Both have a defined start and end time, and place that they pick up and drop off. Additionally both don't have the best coverage, especially outside of large cities, and then not all of them either. Also Trains can be more expensive than driving.
Completely agree with you about the reasons to buy a motorbike. I'm not convinced that people would pay for this. I would certainly be concerned if I was on a bike that started to do stuff without me. Riding a motorbike is more interactive than driving a car.
I could see them displaying more info for a rider, maybe some sort of HUD in the helmet. Like, a red light to a side that a vehicle is on as a warning not to overtake. Though I'm not convinced this would be better than just being aware of your surroundings.
If they are even available in your area, they have set pickup points, don't leave when you want them to (could be a 30min wait), could involve transferring, could be overcrowded, don't allow music played through speakers (hopefully), and sometimes go out of service at night.
I only put up with this since, in the end, it is not that bad compared to the cost of owning a vehicle + having to drive and park it, given my current finances and goals. Once I achieve my goals? Private pod 9/10 times!
Oh, another scenario is taking pictures. It would be nice to be able to take pictures while driving.
Now if we go the idea of self driving why does it have to be a traditional motorcycle. How about a two wheel pod complete with stability wheels when stopped? Need a ride, hail a service using these and it can be done very cheaply. the self driving self service revolution need not be confined to four wheeled vehicles
The 'unnecessary' tech is designed to lower the very high death rate of motorcyclists.
It will indeed make the bike more complex, but if you don't want the tech you don't need to buy the bike, it will be purely for those who prefer the extra safety (assuming that the safety is indeed improved by these changes).
I understand self-driving cars, some people really enjoy the idea of doing things in a moving pod (trains and buses are too lower class for them?), but a BMW motorcycle is something you buy because you like the idea of piloting an engine while being exposed to air and the elements, battling physics and -unless you bought a BMW because you want to show off- owning a vehicle that can be very reliable on extremely rough terrain.