The NTSB may not be interested in assessing blame or neglect, but the FAA sure is. Anything that is said to the Safety Board is available to the FAA; retracting one’s statement may lead to perjury charges. Better to wait and be sure of what you’re saying, rather then say the first thing that comes to one’s mind and live in regret
The FAA is very happy to issue pilot certificates, it is job security for them. After issuing the new certificate they will spend the next four or five decades trying to get it back. Nope, it is much better to kindly deny their invitation to chat.