Sorry it is difficult to trust almost anyone in the trades. It is easier to do the work myself and not deal with strangers in and around my house. When I have to hire someone I tell them up front that I'll be checking every detail, pay extra to purchase the materials myself, and if they don't want the job - well good! I always fine someone who will work with me as I pay a bonus for that.
The article was well-intended, but it makes it sound like painters are the crooks and consumers are innocent victims. That is blatantly un-true. Maybe there should be a follow-up article that educates consumers how not to be shysters by expecting a ton more than they said at the start, or not paying the balance of the job unless something else is done that was not in the contract. Tradesmen have a rough road when dealing with consumers that have short arms but long lists of by-the-way items. No, I'm not a painter...
Federal law requires all renovation, repair, and painting firms (including sole proprietorships) working in housing, or facilities where children are routinely present, built before 1978, to be certified. Firm certification is a key requirement to ensure the training of individuals and the use of lead-safe work practices.  Firms must apply to EPA for certification to perform renovations or dust sampling. To apply, a firm must submit a completed application and fee to EPA online. 
IF the average cost is $1700 to paint an interior, then that means the cost of paint is approx. $200 (12% of the job).  Or better said 5 gallons of paint (if the average cost is $40 retail).  The average room takes 1.5 gallons which will cover 3 average rooms.  Doesn't sound to average to anyone with knowledge of this industry or a average house.  You are misleading consumers and should do a better job in your research.  No wonder so pay people think prices to get work done by professionals is high.  Its not high, its actually average which is more like $3700.

House Painter Co