Because that is what over 90% of the presses on the market were back then.
My first press in '73 or '74 was a Rock Chucker because I thought it was the best that I could just barely afford. 8-10 years later I inherited a Texan C frame press (aluminum) that I had helped my brother select. Then about 15 years ago I acquired a Reloader Special at a yard sale. All three are good presses, but if I could afford them I would add a Lee press or three.
First choice would be a Loadmaster for pistol loading. A Breech Lock Pro might be a near ideal depriming station if equipped with a case loader and a case kicker. If I needed another heavy duty press then I would select a Classic Turret.