That’s what LAC offer, a liberal arts education, including humanities.
What do you think an LAC would offer to you that would make it better than a university? If you want the BS, you’ll have to go to a university that offers it. You can find smaller universities if that’s what you are looking for.
At many large universities, the psychology degree is a BA because the department is in the school of arts and sciences and all those pesky humanities courses are required. You can still take the psych classes, but just have the core requirements too. At my school, all the sciences like chem, bio, psych, physics were in A&S.