I have never understood why simple hoods can’t be affixed to things like street lamps. Seems like it would be better for everyone, so why isn’t it done? Not that I think we need the state to mandate anything.
Freegards
Many standard streetlights are models that have been around for decades. They are standardize, cheap to produce, and use cheaper light bulbs. Shields are just an added expense.
Still other cities install “historic lighting” that are just a big glass ball on a metal poll that blast in every direction.
Home flood lights...well they are there to flood light.