Why do builds put points into defensive rebound, instead of offensive rebound?

I see this a lot - SG/SF/PF builds that choose to build something like 75 defensive rebound and 50 offensive rebound. But offensive rebound is FAR cheaper for these builds - that same build could have instead gone ~85 OREB and 65 DREB for the same price and have far better rebounding badges.

What am I missing? Why do most smaller builds prioritize defensive rebounding when it’s way more expensive?

Edit: the numbers are to illustrate the point, they’re not accurate but close enough.