Recreational cyclists seem to be anything but going by their hang-ups. As a social group, we seem to have a lot in common with other groups like so-called 'outlaw' motorbike gangs when it comes to displaying our 'colours' even when we have no such affiliations.
Take, for example, the rainbow jersey. To say one has to earn the right to wear a white jersey with five colours on it seems to imply we belong to an association where these colours mean something in particular, like a high rank in some type of military or hierachical context. To say that somebody doesn't deserve to wear these colours is to say that somebody belongs to a corporate entity of some type, even if that person doesn't identify with this entity.
In short, why does riding a bicycle mean you belong to a hierachical group? I, for one, used to race many years ago and now ride for the fresh air, the birdsong, the fitness, the peace and the sheer joy of expanding my lungs. This crap about earning such and such a right smacks of elitism, conservatism and puritanism (which is three too many isms for anyone). It also betrays a self-importance that assumes an exclusive association with the elite performers of a sport. By not wearing their colours out of some type of distant fan-mania, you are flattering yourself by association, which is pretty sad.
And why do these arbitrary restrictions end with certain forms of clothing? Don't we, by the same logic, have to earn the right too to wear pro team clothing as these are elite teams comprised of national and world champions? By this logic we shouldn't be riding pro-level bikes either as these are surely something to earn as well.
Cyclists endure real hardship at the hands of others, from negligent motorists to indifferent road and transport planners and authorities. The last thing any of us needs is to suffer condemnation from others who like to pedal.
Cycling isn't inherently competitve. If you think you're better or more important than the person you just blew past, or holier than thou because of the clothes you choose to wear whilst cycling, I am glad I don't suffer your friendship.