unix-guy
Master of RTFM
My guess would be that maybe they buy the pieces already shaped and finished... So cutting would require finishing after cutting.To your point yes they could still cut to spec! Why they dont would be interesting to know.
Just out of curiosity I did some math based on all of their size offerings and If you look at all of the sizes they have available width and depth wise it works out to almost a total of two 4'x 8' sheets of steel! From a manufacturing side of things it appears to be pretty efficient with their use of that material!
But it's only a guess.