I suppose you are right; however, here in Detroit, anything that is not literally bolted on to a bicycle, is likely to be stolen anytime the bike is parked somewhere.

Zip ties are also good for emergency repairs. I have used them to reattach brake levers and lash on rear racks before; so I always carry a few.

I guess the "purists" are not troubled by these concerns. Their coffee shops are in much better neighborhoods and if they have a mechanical problem, they can summon a whole SAG wagon with the wave of a cellphone.

regards
Dan