I now use my starting clamp to push the string thru.
Works well for that. That's the only use I've found for a starting clamp
There are many reasons for a starting clamp, your post comes at no surprise .
Comments like yours just shows your lack of stringing experience.
You can use a starting clamp to start cross strings, to start main strings using Yusuki method,or used just to back up the anchor clamp when starting mains, needed for many of the ATW patterns, some Babolat racquets if you want to string crosses top down, and pattern calls for top cross string to be tied to a cross string a starting clamp can accomplish that. I use it to flatten string end to make it easy to cut tip to a point to navigate string through blocked hole,
Some use starting clamp to cinch up knots.
Also comes in handy if when you get to a racquet to string and find out cross string length is 2-3 inches short to reach tension head on last cross string just what would you do
@TimeToPlaySets , start all over, as starting clamp works great as bridge to finish as normal, string enough different racquets and that happens from time to time with all stringers.
Starting clamp is not necessary, but makes life better for a stringer.