It works for now, but the reason most wires have a rubber-like insulator around them is that it takes very little to Crack or abrade a thin coating such as this and turn it into a fire hazard.
I'm surprised a product with such a small safety margin is allowed for sale.
The Constant, by Mark Chrysler.
Headlined as "a history of getting things wrong", the host goes into deep dives about what we thought we knew, how we eventually came to figure out we were wrong, the repercussions of both.
It takes a seriously funny and well researched approach to a number of major events in our history, and I absolutely must recommend "the foolkiller" a five episode exploration of a submarine found at the bottom of the Chicago River then lost to history, with a very juicy footnote delivered several episodes later, that I dare not spoil for you.