Details are important though. Some bikeshed type ideas spiral into very expensive changes. This is a large part of why US transit construction is so much more expensive - people asking for lots of little details which add up (large monument stations, bike paths done with the project... those things all add up) - the important safety details are left to experts, but only after they are told to build something far more expensive than needed. (this isn't a plea for brutalism architecture there are nice things you can do that are only minimally more expensive)