To have a "standpoint" means to be able to not only experience the harms of a social or political system, but to recognize the ways in which that system interacts with one's identity. While "lived experience" can be personal and reasonably unreflective, standpoint epistemology is a position of knowing "earned" through intentional analysis.
Here’s the deal with theta: it’s a different kind of knowing than beta. Beta is a crisp, oh-I-just-cogitated-this-thought. But experience in theta is knowing. Theta hits you in a total, murky, deep-but-diffuse way.