Behind those slogans is the idea that intellectual life doesn't belong to a chosen few, but to everyone who's interested and willing to engage their capacity for independent thought and critical thinking, and those who are willing and eager to engage with other people with different opinions.
That's why there are people (eg. in Europe) who aggressively promote secularism, and many agree with that, until you find out they belong to some hateful anti-islam organization. And that's why some people put science into question, like, how can we be sure of anything, which is defensible from an epistemological standpoint, until you discover they are creationists.
So you want to be careful before giving random people the benefit of the doubt.
Honestly, if skeptical arguments in epistemology can be used to strengthen Creationism, I think that's a major point against taking them seriously in epistemology. Good epistemology ought to have a low enough false-positive rate (disbelieving things when they're true) to throw out "all the evidence is wrong, because I got this book someone wrote a while ago".