Sam2: Anyone can choose to act as a baal nefesh thus working himself to that without any pretensions from accepting upon himself to be noheig to be machmir to only consume C”Y.
mesorah 123: Translate baal nefesh and you’ll have your answer. Someone who does what’s best for his neshoma. Even if according to the letter of the law you can do less without violating the law.
DaasYochid says he heard confirmation that the maaisa of Rav Moshe vomiting up C”S is true. Others deny it. You claim that Rav Moshe and his sons consumed C”S. Others deny it and Rav Moshe himself writes he is makpid.
Are you going to believe what Rav Moshe himself writes or are you going to believe the stories where everyone claims something else?