I think his point, though not well made, is that it’s likely parent is not the first to ask this question and that the researchers have likely already thought about that.
The early bits are pretty readable so far [0], but I doubt it calls the original question out quite as succinctly as it was asked. Lots to mull over though!
[0] https://www.liebertpub.com/doi/full/10.1089/ast.2019.2149