If I misinterpret what I've read about travel to CI, please feel free to correct.
Currently a traveler has to fit in one of a group of categories to be able to travel to CI. I'm guessing that Mack could travel there because she or her family (more likely) owns residential property, or she has close ties to a resident (not sure boyfriend fits here.)
She would have had a PCR test at the airport upon arrival with a 72 hour window for results. A second test would have been given after the 14 day quarantine. I bring this up because Mack, according to reports broke quarantine only 2 days (~48 hrs) into the quarantine, but many people are saying she had tested negative twice - family member says before she left for CI and when she arrived. I don't see this as a defense in this situation.
Assuming she was not in a government quarantine facility, she had to wear the wrist monitor for 14 days, but chose to, with the help of her boyfriend after only 2 days of quarantine, remove it. Was her dad, a competitive jet skier, there for the competition and whether he was or not, shouldn't he have given her some fatherly advice? Wouldn't the boyfriend have told her about the Canadian couple who earlier breached quarantine (and paid a fine and aren't allowed to return until COVID regulations ease) and CI's laws about breaching a quarantine.
I think it's obvious what the plan was once she arrived. Had she not been caught on day 2, would she have continued to breach quarantine? (And had she, how would people have felt then, no matter her age?)
As to her sentence, was it too harsh, too lenient, or just right? The only thing I would be concerned with is what
@scubadada refers to - that being a part of one's record at such a young age - but I don't know what level or class of crime it is considered in CI and if that is something one would have to put on any type of application here in the U.S. I would be against her sentence having an effect on her rights in the U.S. Does one's character and record in the U.S. have any bearing on a case in another country? I also wonder if the offense had been committed by a 45 year old, would people have the same feelings about the case? It is what it is, but with the lawyer appealing and the social media what it is, I'd be surprised if the sentence wasn't reduced.
As an older person, I think most of us who travel tend to research where we go. We assume any risks associated with that travel. During these Covid times, circumstances dictate different measures - I have no problem with what a country or an island does - I know I can make my own choice, right or wrong - I just need to live with my choice. We take 2 week trips but there is no way I'm going to CI as long as there is a 14 day quarantine in place even if I were lucky enough to own a residence there - now if you were to give me a house on CI, I would force myself to stay inside, outside, or whatever it takes for 14 days!!!!