Even I am surprised too but I guess since Google started working on self-driving cars and then after seeing the advent of ride-hailing apps, they may have thought to keep Waze so one day Google can convert it into a ride-hailing + navigation app. Maybe that's the plan who knows!
i still don't get that argument. target audience of Waze is people who have cars and drive it around. people don't open up waze to get a taxi, they open it up to start driving.