I have no idea what her deal was with eating utensils, something about eating naturally. She also hated baby food and would give her kid things whole, like an entire cookie or so.
She also did co-sleeping obsesivelly, but it began with her failure to teach her first how to sleep in his own room.
She said the japanesse sleep with their kids for years as a reason, and she likes to ignore that japanesse kids are teached from the start to be self-sufficient and that people doesn't show affection publicly there, so I guess she was just cherry picking aspects of another culture.
So, based on my experience, I'm pretty sure most of these mom's obsessions come from insecurities and just plain incompetence.