No. The number of times I've needed a medevac flight is approximately zero. It's not like Fiji has no healthcare for routine issues (not to mention that Larry Page can easily afford to fly doctors in from anywhere on a private jet). Obviously, a medevac flight indicates something more serious, and probably unexpected.
Frankly, even given private planes and all, I would probably not have chosen some place outside the US to ride out the pandemic simply given that it adds a potential level of complexity in the case of an outbreak in an uncertain world. But there's nothing inherent to Pacific islands--including those in the state of Hawaii--that would make it inherently irresponsible to take a child there for a week or for months.