people used to think this about babies; infants underwent surgery with no anesthesia or analgesics into the 20th century. now there's some evidence that newborns might respond more strongly to pain than adults. "probably" isn't really good enough for me. if it retreats from pain or reacts defensively when you inflict it, it perceives pain; our judgment of the extent of that perception is sort of irrelevant. so, yeah, if this is a thing, it's a shitty thing.
Yeah, that's crappy too. I saw a study where after infant boys were cirumcised, they did not want to breastfeed and seemed to recover better if allowed to sleep. However, some also argued that babies don't remember
the pain, so it's OK to inflict it. HUNH? Probably some people would argue that with the roaches too. I personally think even traumatic and forgotten occurences can cause psychological damage.