Totally agree. I think part of it is to show your child is not fussy and you're such a good parent. But as a parent of one child who eats pretty much everything and is currently desperate to try the Marcus Waring kids tasting menu and another child who has a very limited diet and hates trying new things... I am not convinced it has anything to do with parenting!
Also:
In my friendship group most children actually do like to eat some fruits and vegetables, so if they give them these all the time they will eat a healthy diet. I think the problem is that the list of dislikes is still quite long, but as long as you don't focus on that, it doesn't make it impossible to eat healthy, it's just the same things every week.
THIS. DD has a limited diet. Drives me crazy. But, she's healthy as a horse because she does eat most fruit, a limited but sufficient range of vegetables (peas, broccoli, avocado, sweetcorn, cucumber, cauliflower, carrots - as long as they are all plain!), cheese/yoghurt/milk, pasta and the odd potato and she will eat plain meat (grilled chop/chicken breast). The biggest issue is that preparing her these different meals can be tedious and we have a bad habit of letting her eat pasta pesto* too often unless I put a lot of effort in.
*I am also going back to making my own pesto so that at least the pesto she eats is not full of additives etc. I really miss the local Italian deli that used to be nearby that sold homemade fresh pesto....!