That isn't the sole reason, but if you compare the "shadowy financier" tone of many stories about right-of-center families to the stories about opioids, you'll see that the "shadowiness" component of the reporting suddenly disappears.
[Living in Texas] in a modern hilltop mansion on the outskirts of the city, in an area favored by tech entrepreneurs. According to tax disclosures from his personal foundation, he has continued giving money to Yale, but his largest donation in 2015 was a hundred-thousand-dollar gift to a neoconservative think tank, the Foundation for Defense of Democracies.
https://www.newyorker.com/magazine/2017/10/30/the-family-tha...
https://www.google.com/search?q=family+behind+opioid+epidemi...
"The Family That Built an Empire of Pain"
"Secretive Family"
"Secretive Sackler Family"
"The Family That's Killing Millions"
"American Cartel"
etc.
https://www.washingtonpost.com/graphics/2017/investigations/...
The reason it matters is that political clout and general goodwill helps shield them from legislative action and judicial inquiry.
EDIT: I googled it, I see where you're going with that...
https://www.newyorker.com/magazine/2017/10/30/the-family-tha...