Yes quite agree - It is about control - the kids are feeling out of
control.

I think if the parents tell them 'I'll control what you will eat, and
it must be done my way' might not resolve the issue.

And in the same way, when the parents cannot control what the kids eat,
the parents feel out of control of their kids, which will not resolve
the issue either.

The idea about letting the kids choose something they don't like and no
question ask is very useful!! We all change our tastes as we grow and
try new things.

I think it is about choice, if the kids can trust that the parent will
always let them choose, and will help them choose if they ask the
parents to, then they feel they are loved and so do not feel out of
control.

And that the parents can trust that the kids can learn to choose, just
like the brussel sprouts story, and trust the kids will ask if they
need help choosing, then there is no problem.

Thinking about it, this can be applied to everything in life.