> "How much cheaper would buses be if they didn't need to be wheel-chair accessible? Surely 99% of people don't have wheel-chairs."

If buses would be so much cheaper that special wheel-chair accessible vans could be provided instead then maybe that's a case that should be shrugged-off.

Are you really surprised or are you just expressing outrage that other people make different tradeoffs than you do?

Even in the nuclear power plant case you mention it's not obvious that it would be better to design every nuclear power plant to withstand disasters that have not occurred in the past one hundred years especially if the alternative is, e.g. a coal-fired power plant.