Imo there is simply not enough mental stack in this game for 24 frames to hit with a significant amount of frequency to call it a true low/overhead mixup.
Obviously, all tools are relative, and all that I was attempting to communicate (yet evidently failed based on these superfluous posts on human reaction, which are largely irrelevant to this argument) is that Sektor lacks the "mental stack" for the overhead to connect frequently, as you accurately stated.
...or Arslan in Tekken with Jin's "reactable" D2...
You fail to mention the context of Jin's d+2.
First of all, Jin has a plethora of low attacks in coordination with d+2, such as d+4, d/b+4, hell sweep, etc.
Second of all, d+2 crushes high attacks, acts as a counter-hit launcher, tracks to one side, etc.
While d+2 is not great as a standalone attack, the fact that Jin has access to the aforementioned low attacks and a couple of outstanding mid attacks (i.e., demon paw, f+4, etc.) creates a mental stack sufficiently high for d+2 not to be blocked reliably, unlike Sektor's 24F overhead.
Besides, Jin's d+2 is faster than Sektor's b+2 anyway, so this equivalency is flawed.
My primary point remains that offense is the most efficacious aspect in Mortal Kombat 1. The characters with the best offensive options are essentially the best characters in the game (i.e., Cage, Cyrax, Havik, Homelander, and Kenshi).
Sektor lacks such options, so she is nowhere near top 5.
Personally, I don't think Sonic Fox not doing well in a casual set vs his training partner should be a strong indictment of a character's tier placement.
Everyone has had bad days where the person they play with all the time gets the better of them.
Point taken because he did perform a lot better in the most recent set against Rewind's Ermac.
But if we are not allowed to evaluate a character based on Sonic Fox's performance in a casual set or otherwise, how are we allowed to evaluate a character?
Mortal Kombat 1 does not have the quality of competition or the quantity of offline tournaments as Street Fighter 6 and Tekken 8 do.
Havik and Homelander have been popping up rather consistently in these online tournaments, though.
NRS will most definitely nerf them while feeding more bread crumbs to Quan Chi and Sub Zero.