Most hatchlings in the wild don't survive their first year. If they did, we'd have hungry snakes underfoot everywhere. Most CB clutches have a high survival rate, keepers are producing healthy, robust babies generation after generation. I think that data is in that snakes can do very well in captivity.
An activist should be well versed in the situation he/she is trying to change. PETA people are ignorant about pet care, farming, hunting, and the natural world in general. I tend to think the organisation attracts individuals suffering from a personality disorder.