Roatan required the 72-hour PCR test and found it was not feasible. It's just a fact that getting PCR results back in the 1-2 days before departure is not likely for the average person. Roatan had a page where you could search US testing sites that were approved. I looked at 5 or 6 and all of them said "1-2 days, up to 10 days". Sorry, I cannot book a $2000 trip with that much uncertainty. There is literally no margin for error or delay.
I think they also had issues with most people just seeing "tests" and showing up with the rapid test results. Last week, they updated the rules to allow rapid test results.