@jackemled @anathema
ok.... if you are actually curious to having an answer to your question then this is what i think of this passage.

1. this law is a ceremonial law from the old covenant doesn't necessarily apply to christians anymore

2. this law is definitely referring to somebody actively choosing to cut off their genitals for whatever reason and not an accident like the example you gave.

3. if i had to guess this was one of many laws given to the israelites to help differentiate their people and their God and their ways of life from other pagans and gentiles around them. id imagine that maybe there were groups out there that were cutting off their genitals has some form of radical celibacy or something, which god did not want his people to be practicing.