if your lower Elo(not superstar) then this isn’t for you In t3 there are too many crowd control moves that are powerful (chem 2nd ult fade 2nd ult fort 2nd ult tigs ult Damion ult skati 2nd ult zk 2nd ult) the list really goes on every pro player knows this and preemptively splits to minimize the effectiveness of these abilities but still in range (most of the time) to help your other teammates this still puts everyone in a place where they have to fend for themselves and make a play and if one person can  kill 2-3 then the team fight is basically won already