“Sent by their parents...”
That has a whole ‘nother meaning in Honduras. My brother volunteered at an orphanage over the years. In passing he mentioned a mom and dad visiting their child for the first time in three years. “Huh??”
He said most of the kids had parents, but the parents were unwilling to take care of them, so dumped them on the streets like a dog. They would even have siblings that still (for now) lived with the parents!
Such orphanages would provide an efficient recruiting ground for kids to "migrate" to the USA. It might help to explain why the "unaccompanied minor children" are disproportionately from Central America.
Next, we have to deal with the problem of getting them into Mexico -- whose southern border is purportedly "sealed".
Then, you have to somehow get a group of kids -- toddlers to teenagers -- across the length of Mexico, to the border with the USA.
Who could do this? Drug cartels.
Why would they do it? Somebody made it worth their while.
So, who would orchestrate this plan -- promote the "opportunity" in America, recruit the kids, pay off the drug cartels? Anybody? Anybody?
Revealing the plan -- and its author(s) -- would be the quickest way of stopping the plan!