If I sat some random person down who has never seen Valorant to tell me what happens when an enemy turns a corner that the turret is watching
A random person wouldn't know the mechanics of a KJ turret while every player and coach would have known how the turret works, so your argument is null. Yes, it is true that the current design of the turret doesn't quite match the description that Riot had provided, but does that make it a bug? Additionally, is it a bug worthy of replay?
The problem is that this turret "bug" was a feature of the game ever since beta and it simply has been how the turret worked. You can't just assert it's outside the realm of possibilities when I explained how it is within it... to put it simply, the turret repositioned to its initial position when it deactivated mid-burst.
It would be as if ever since Chamber came out, his trips didn't show a range, but the trips deactivated once Chamber walked 50 paces away from it. Furthermore, it doesn't state in the description for the trip that Chamber must anchor his trip in order for it to remain active, such as the alarmbot, turret, etc. Chamber players simply knew about this feature through trial and error, and have worked out that they must stay within ~50 paces for it to remain active due to their game knowledge. Then, suddenly, after 2 years, Riot just claims that that's actually a bug in the middle of a major tournament. You think that's justified?
Even if we claim it is a "bug," it's something that Riot had neglected and had become a feature of the game. It would be ridiculous to, then, fault a team in a tournament for Riot's mistake, especially when everyone knew about the "bug." Notice how XSET members want NOTHING to do with Riot's decision? That's because anyone with decent game knowledge knew that this was within the possibility for how the turret functioned. Riot should have fixed this "bug" in the next patch update instead of faulting FPX for simply jiggle peeking a turret.