I’m quoting your link, by the people who argue for ivermectin: “We understand why policymakers are focused on vaccines. Vaccines will offer better, or longer-lasting, protection than any drug.”
It doesn't mean that's the case here, but it's certainly possible. The suppression of discussion of it means it's hard to really know.
"Special emphasis must be placed on the harm of excluding trials data supporting ivermectin in the prevention of COVID-19. If the preventive efficacy of ivermectin were to be known or accepted, this would allow deployment in regions without vaccines."