Not only is this a huge disservice to the children (failure in parenting), but it is a disservice to the parents as well. How can they really have a life after kids if they force their kids to Stay kids?
I've an uncle who was married for the first (&only) time in his mid 40's to a woman in her mid 30's. Neither of them had ever lived outside of their parents home prior to the marriage. BASIC things, like making breakfast, shopping for groceries, getting themselves up in the morning, and doing laundry were challenges for them.
Having my kids do age appropriate chores around the house teaches them life skills that they will need in college and beyond (and sometimes the skills they need to survive a weekend at their mom's!). As a father, I feel that part of my job is to teach my kids to not need me, because I will likely not outlive them.
Sorta reminds me of going off to college and meeting the kids whose maid did their laundry and meeting the kids who were so utterly sheltered as homeschoolers that they were incapable of making it outside of that protective bubble and partied themselves right out of school and into a rehab in a year or less. {Note: not knocking homeschooling in general, just knocking overly sheltering your kids.}