It sounds like you are considering reaching out to some people but you are not sure if it's necessary or if it will make a difference. Here are a few things to consider:

If you have been putting off calling these people back, they may feel ignored or disrespected. Calling them back can help repair that relationship and show that you value their time and feelings.
Even if the conversation may be difficult or uncomfortable, it's better to have the conversation and clear the air rather than let things fester. It can help prevent misunderstandings and build stronger relationships in the long run.
It's important to approach the conversation with empathy and understanding, and to be open to their perspective. This can help create a positive and productive conversation.
It's possible that the people you are thinking of calling back may appreciate the gesture and feel valued and respected. It can help build a stronger connection and deepen your relationship.

Ultimately, whether or not you choose to call these people back is a personal decision. However, considering the potential benefits and approaching the conversation with care and empathy can help lead to a positive outcome.