Both you and parent would do better providing citations to back up your assertions. I suspect however that the person you are responding to may have an easier time of it.
Those percentages speak for themselves, and they're not screaming "heritability". They speak to a strong environmental element, but that aspect seems to change over time. Mind you, environment is more than just parents.
Edit: 1 https://www.ncbi.nlm.nih.gov/pubmed/15745438
http://www.apa.org/monitor/apr04/beliefs.aspx
Those percentages speak for themselves, and they're not screaming "heritability". They speak to a strong environmental element, but that aspect seems to change over time. Mind you, environment is more than just parents.