The complexity argument rings hollow to me. It’s a bit like saying distributed databases are complex because you have to deal with CAP guarantees. Yes, but people still develop them because it has real benefits.
It was maybe a valid argument 10 years ago, but in 2025 many companies have shown sensor fusion works just fine. I mean, Waymo has clocked 100M+ miles, so it works. The AV industry has moved on to more interesting problems, while Tesla and Musk are still stuck in the past arguing about sensor choices.