There are a lot of cowboys in our industry, these I would class as not bothered to take any trainning at all, no insurance,hired or under powered machinery,no customer service or back up and have no concern for the customer only getting their cash at what ever means they can.
Whether your NCCA, BICSc,IICRC,PROCHEM etc etc trained or accredited,it is still down to the individuals ethics and working practices.
Every body has got to pass the same standard driving test, but there are good drivers and very bad drivers out there, down to just not being capable to drive or just could not be bothered and drive like an idiot.