This "skaters peak at 15 or 16" argument is BS. They "peak" at that age because that's the age at which they can probably do the elements that gain the most points. That's a problem with the way the sport is structured and what it rewards, not with the age limit.
And given how long Tara trained with Callaghan and the behavior that was described in the SafeSport decision on his case - there is no way she couldn't have seen at least some of that. Maybe she was "safe" because her mom was around and was part of her career, and/or because Callaghan was smart enough not to mess with one of his stars. But how dare she trivialize what he did to others by describing that environment as "safe"