Michael Holding, someone with more knowledge than you who’s just salty on Kohli, openly stated umpires call means the umpire is guessing.
I’ll take the great West Indian’s opinion over yours
Umpires call categorically DOES NOT mean the umpire is guessing.
Umpires call is in DRS as the tracking software is not 100% accurate so they have built in half a ball width margin for error on the outside of the stump, thus allowing this the umpires decision to stand when it is close.
This also gives the umpire benefit to make more accurate calla and not be proven wrong by slightly inaccurate tracking.
this has always been the case and its crazy how many people don't understand what exactly umpires call means and why it is there, including current and former players, pundits and joe public