Licensing for trades

In the great state of Missouri, licensing is not required for many trades including locksmiths. It seems as if the government has adopted a policy of licensing only trades that can affect consumers on a personal (i.e. > bodily) level.

Watching advertising practises online, provides many examples of misleading messages. None more-so than the quantity of websites and online advertisements that state "Licensed, Bonded and Insured".

How can one be licensed if licensing does not exist?

If an advertiser is lying to you in print, how can you trust them for real?

Perhaps the consumer doesnt really care whether the tradesperson that answers their query, is licensed or bonded or not?