Valorant's 9-3 Curse Is Real

Valorant has a curse, and it’s real: whoever you are, however you play, pro or casual, it’ll strike you all the same.
Even when you think you’ve already won, you will lose. They call it the 9-3 curse: teams up 9-3 at the half somehow always manage to lose the game, despite their incredible lead. So, why does it happen? Is 9-3 just not a big enough lead to seal the deal? And why do teams choke?