Your analysis leaves much to be desired, though, as it comes perilously close to equating "we can't prevent 100% of fatalities" with "we shouldn't care about, learn from, or make changes in response to a fatality".
What the Uber crash has shown us is mostly the willingness of people on HN to excuse Silicon Valley darlings even when they actually demonstrably kill people.
I don't think it has anything to do with "Silicon Valley darlings" (of which Uber is certainly not anymore). It has more to do with "super cool future tech" that they really want to see implemented in their lifetimes - so much so that they may make dubious arguments to support thier position.
What the Uber crash has shown us is mostly the willingness of people on HN to excuse Silicon Valley darlings even when they actually demonstrably kill people.