Addiction to Chemicals is Caused by Human Bonding Deficiency?

This has been a spectacularly popular Huffington Post article from January 2015. It drives a very important message that everyone should hear: Addiction is not really about the drugs, it’s about the quality of social interactions – or rather the lack thereof!

http://www.huffingtonpost.com/johann-hari/the-real-cause-of-addicti_b_6506936.html

So, would it be a good idea to legalize everything and focus on improving society?