You are right - of course they are there for a reason. I have mine on a similar arrangement to get quick access during work - they are a critical part of the job we do. Having said that I have met a number of tilers (alright most I have met) who take great pride in all their equipment whether its cutters, trowels, or levels. And why not?They are not there for display Andy, they are there to make me money.
I try to keep my van nice & tidy & they are stuck there on a magnetic strip.