I just drive and own one car so I'm content to keep my driver's licence and ownership and proof of insurance hidden in that car. This is the GTD @ location where I will need these documents. The last "interaction" I had where I had to produce these documents was in 1990s. There is no benefit to carrying therm with me.
if anything there is a liability. If these documents end up in criminal hands, they could be used for identity theft. This is why I hide them. If someone steals my car, I don't want the thief having these documents.