I think that's too simple a reading. There is a whole industry of people whose job it is to create doubt about science so as to prevent action that might harm those who pay them. It started with decades of denial that cigarettes could possibly cause harm, but went from there:

https://www.amazon.com/Doubt-Their-Product-Industrys-Threate...

I'm glad that a guy with a political science degree is interested in scientific topics. But I think he'd be a little more sensitive to the broader problem of non-experts jumping in to an area that has become highly politicized, and where industry has such a strong short-term incentive to undermine the appearance of scientific consensus.