Sadly, a lot of pedestrians are stupid. I’ve watched them walking across a road, phone in hand, straight into an idling parked V6 with a hole in its exhaust, and still be confused.
Pedestrian warning systems are a good idea. But nature will always come up with a better idiot
YMMV but I put I small cushion behind my lower back on an IKEA Markus and it’s been my favourite chair I’ve ever had