To me it seems you just spent three paragraphs answering your own question.
can't even see 50 meters ahead
didn't understand what it was and how to react to it
FSD is not a finished product. It's under development
doesn't mean it's obvious to the AI
If I couldn't trust a system not to drive into a train, I don't feel like I would trust it to do even the most common tasks. I would drive the car like a fully attentive human and not delude myself into thinking the car is driving me with "FSD."
I've never hit a train. And I've also never almost hit a train. I think I could go my entire life never almost hitting trains and I would still consider that the bare minimum for a mammal with two eyes and a brain.
I'll post it to Printables.com soon. I'm not sure how common the brittle plastic issue was but, yeah, there seem to be a lot of variations using this exact same case design.
I haven't seen the LEDs yet since I've lost the power supply, but I've used the same PETG pipe technique a couple of times before and it works great.