youngoldbloke
The older I get, the faster I used to be ...
Actually, the impression I got from the site you linked to was that being attached to the bike is a relatively recent idea. For a long time, there were just various different designs and shapes of flat pedals, then toe clips and straps were introduced. It's only in relatively recent years that being attached to the bike has become "the thing".
Sager patented 1896 - recent years?? "This is but one of the many early designs of toe clips from this period. Fortunately, this example is one of the lucky few that survived the last 110 years."
If no-one was allowed to participate in an activity unless they were wearing the "correct" clothing, we'd have even more of a problem with obesity than we currently do.
- depends how serious you are about the activity. I wouldnt like to go walking in the Cairngorms in flip-flops.