Yeah. I think you are right. As long as the catalog is accurate the math works.
I don't mean to be argumentative,but I'm not balancing what was supposed to be a low buck hop up for a pickup.Mallory metal isn't cheap.
We didn't even pay to balance the dirt track stuff we built when I was kid. We just kept the weights close and rolled with it. Guys thought I was wasting time by weighing each piston and rod combo and lightening them all to match the lightest one.
I would posit that of the millions of engines bored and rebuild with replacement pistons very few are actually balanced. I've seen big block Chrysler with 60 over cast pistons that weren't balanced and there had to be a lot of weight difference there.