I don't own a Tesla, but whenever I ride with friends the center console shows an overhead type view of the other cars around. The cars randomly blink in and out, indicating it doesn't know if the other car really exists or not.
A cars UI has has exactly one function: provide accurate and actionable information to the driver. You should never need to second guess the information you are receiving.
Imo I don't know any other consumer car company that shows anything like that on their cars infotainment console. Companies like Waymo and Cruise do a much better job at capturing surroundings but they are in a different market where it makes sense to spend a ton of money on each car to add many LiDARs and significant compute in the car.
You seem to be on to something here...
Just show the navigation stuff. The driver should be able to see other cars with their eyes. The car clearly isn't good enough at spotting them itself, so why further distract the driver by trying to guess?
The wild flickering of lines, obstacles, humans and cars in perfect clear daylight conditions is absolutely flabbergasting to me and erodes any trust I have into self driving capabilities. It's outright scary.
Cars that are running basic autopilot show basic autopilot visualizations.