Please let's not let not washing your clothes become the trendy thing to do. Public transport can already smell bad enough. Just wash your clothes, keep smelling like flowers and pick something else to be different about.
Not saying people shouldn't wash their clothes, but that flower (or other) smell you seem to find pleasant isn't pleasant for everybody. Don't know why, genetically probably, but I really dislike most synthetic smells. It's also not just the smell but also the fact it's constantly there, sort of annoying me. I'd rather have people wash their clothes using water (lots of clothes don't seem dirty enough to really require soap, as far as I can tell) and then hang them outside to dry. Though I realize that is not an option for the majority of the population. But it would me nice if most of those products would smell less, or if at least people would use less. It's not because the marleting department of a product decides X is the right amount to advertise, that it's also what is really required,.
They don't need to wash with only water. The best solution would be to use perfume free products for people with Asthma. I don't have Asthma but I always buy products for sensitive skin with zero perfume and no colors.