I realize that but there are no other intellectually interesting features that usually define HN submissions. The only notable thing is the company is founded and run by Jessica Alba. Correct me if I'm wrong.
I think the connection here is Honest Co. is a heavily marketed as a way to be an ethical consumer -- akin to whole foods, soylent or hampton co. In addition, Honest Co.'s best selling products are baby related and the mean silicon valley founder is approximately 30 (https://hbr.org/2014/04/how-old-are-silicon-valleys-top-foun...) which is also about the same average age for having your first child in California (https://www.cdc.gov/nchs/data/databriefs/db232.htm)
So based upon that, the user overlap between HN and Honest Co. maybe larger then you think.
Not all of the things posted on HN are about 'tech driven' companies, even though the majority are.