Chiara Vigo: The last woman who makes sea silk
bbc.co.uk
bbc.co.uk
This strikes me more as keeping it a secret within the family more than protecting people from God. Business failed sure but that's no reason to keep the process of making it shine a secret if she is hit by a bus or drops dead that's it for the knowledge.
The expert guest on genealogy said people often hoard family artifacts and if (when) there is a disaster such as a fire in their home it's all lost.
The hoarder would be better off sharing information and some artifacts among relatives but some people feel compelled to hide it as if it were treasure (which it may be).
[1]: http://www.npr.org/sections/goatsandsoda/2015/08/08/34068270...
I know at least that MIT has: