It is not fair for that safety to be taking all the blame on this play.
Let's put it generously and say D. Smith's ability to avoid any misdirection at the LOS put the safety in a very awkward position. This photo is great. The safety has responsibility on D. Smith. Jeudy is coming across the field without coverage, whom he may or may not have seen, but give him the benefit of the doubt. (I have no idea what his cover guy was thinking). Plus, the safety knows that no one is covering Harris in the middle of the field and safeties and DBs trying tackle him in space after he has a good head of steam is not going to go well for UGA -- and Tagovailoa is looking right at him. Can he just run away from that?
Added to all that, he has watched no telling how many hours of film that show with this much open space the Alabama qb is very likely to split defenders running and cover a lot of ground (see last year's last offensive play, for example). Hurts wasn't in there, but it's not like I think he processed that in the 1-2 seconds he had before he was utterly lost. Now, it did look like he took one step towards the LOS, maybe trying to indicate he was spying Tagovailoa or trying to induce a hurried throw to Harris. Either way, when someone runs like Smith, that kind of time is poison -- he either headed for the sideline immediately, hoped we dropped the pass, or, well, what happened. Frankly, I'm not sure he gets there in time from where he started unless he immediately heads towards the goal line at the snap (which the corner was apparently expecting him to do).
No going back and altering the past, but even if he ignores the QB entirely, flips, and takes off after Smith on schedule, this play is still going to be at least a decent gain unless the pass is batted down or dropped. If the safety was in position, my guess is we throw to Harris who might or might not get stopped short of the first down. Then the safety is criticized for leaving the middle of the field open. Jeudy would also be a correct read and probably for 1st down distance and perhaps a home run, with his speed. Smith, Jr. is a possible at the point the ball is thrown but it would have been a tougher catch -- hard to tell from the angle but if he catches he is probably close to the first down.
No doubt Tagovailoa made the best play off the best read. However, that safety was in a serious, serious bind from about one second after the snap and it was not all his fault.