Family dietary coach fuels healthy eating: study

Why do people do studies about topics as obvious as this? Perhaps to help 'diet coaches' feel worthwhile? I think a follow-up study on why diet coaches have low self-esteem might be in order.

The other idea is that these sorts of results are reported at fancy Club Med type resorts where committees meet, so this study gets the "scientist" a free trip to a posh vacation. That doesn't seem to be the case in this groundbreaking (?) study however.

Thus I'm at a loss about this study. One might even say I'm vexed. Here's the leadoff paragraph:

Having a nutrition coach actively coach families on how to make healthy changes in their diet appears to help parents and their children improve their nutritional intake, researchers found.

This result thanks to Damien Paineau, manager of scientific studies and coaching for Nutri-Health, in Rueil-Maimaison, France. Sadly I couldn't find M. Paineau's email for us to congratulate him on this 'breakthrough'.