Not offended or mad or anything, just answering your questions. If you want a little more proof, well here ya go. Note the price differences. I just hopped onto Summit's website to give you an example of the price ranges of rod ends. This does not even factor in the pricing of the smaller tubing and tube ends, which would be cheaper also.
Budget, Standard Series Rod End:
http://www.summitracing.com/parts/HAL-CMR12/
$12 each = $48 worth of rod ends per set of Lower Control Arms
Middle Road, Chromoly:
http://www.summitracing.com/parts/HAL-PCMR12/
$17 each = $68 per set
Indestructible, Moly, 3-piece, Teflon Lined:
http://www.summitracing.com/parts/HAL-XPMR12/
$42 each = $168 per set
Obviously the suspension companies would get a price break buying 100s of rod ends at a time, but I hope that shows you where the differences can add up.