Hi @SeanY,
Welcome to the community forum!
Please see Disable TLSv1.0 and How to disable TLSv1 for an example of how to disable older versions of TLS. As for the certbot team’s decision, I cannot speak for them but the following links may help. https://github.com/certbot/certbot/issues/5354#issuecomment-446303227 and https://github.com/certbot/certbot/issues/7205