You don't
need LIDAR for self driving cars. You also don't
need megawatts of power to play top-level Go: humans do it with a few tens of watts of energy. Yet Google needed ~megawatts of energy to run AlphaGo on their massive server farm.
Imagine two companies competing to win at Go, and one company had the attitude that megawatts of energy was not necessary, and another company threw whatever resources they could. The second company just played top-level Go this year. The first company is at least another 5-10 years away from it.
I'd also like to point out that humans do SLAM already (LIDAR solves SLAM). From a previous comment:
Humans implicitly perform SLAM (simulataneous localization and mapping). What do I mean? Look around your room. Close your eyes. Visualize the room. As a human, you've built a rough 3D model of the room. And if you keep your eyes open and walk through the room, that map is pretty fine-grained/detailed too and humans can keep track of where they are in the map.