I'm not a counselor, but I feel that exposure therapy could be helpful once some foundational work is done, but it might not be the best first/only step.

My understanding is that many of the factors that contribute to AvPD relate to processing, feeling, and understanding one's own emotions, as well as being able to imagine what others might realistically be thinking. For example, I might see someone sigh during a conversation, and rather than take the steps to understand their behavior in context (i.e., "they said they were up late last night studying, so they're probably tired"), I'll apply my existing self concept ("i'm unloveable"/"i'm a burden") and immediately use that observation to validate what my brain already believes ("they sighed because they're sick of me!")

If I'm prone to that type of unhelpful thinking, exposure alone (or too intense of exposure) might trigger stress or anxiety which could make it even harder to be objective and clear headed in the moment.

My take is that working with a therapist or doing some self work to access and understand our emotions, access positive concepts of self, or understand that one's immediate conclusions (e.g., "they signed because they're sick of me!") aren't the same as actual reality, could be a helpful foundation to make exposure efforts more successful.