We can argue about how 'flat' most cities are or are not (most cities have very large areas which are flat), but given that, anyone can ride bicycles. Have you

We can argue about how 'flat' most cities are or are not (most cities have very large areas which are flat), but given that, anyone can ride bicycles. Have you been to the Netherlands? I've very rarely been in a city that couldn't have massive cycling improvements across most of its area. Other forms of transit can make up the gaps. I completely reject your 'able-bodied young people' comment as a reasonable assumption about how accessible cycling is.