One of my part time gigs is reviewing weed. I have smoked over 300 different strains this year, so please trust that I know what I'm talking about in that realm. What makes for a $100 eighth is a combination of potency, bag appeal, aesthetics such as nose and flavor, type of effects, difficulty of grow and the rarity of genetics in relation to demand. You're not gonna sell an eighth of Runtz for $100, because it's not hard to find a quality Runtz for less. If you had an original cut of some heritage strain like Skunk #1 or a rare cross that checks all the aesthetic boxes, you can demand more money because of it's quality and rarity. No connoisseur really cares about THC percentages, it's more for the government and beginners. If THC percentage was everything, disty carts would get you high as ****, but they don't.
A top RT is like a Runtz. It's nice, but they are easier to find, especially in the later rounds. They are also cheaper in free agency.
A CB, DE, or DT is like rare genetics or a unique cross grown indoors in living soil. It's hard to find on the cheap and cost alot in the secondary market.
Value is not just for trade, but for opportunity cost. Taking a position in an early round that could be filled in later rounds means that you miss out on the top prospects that are most often found in the early rounds. Taking Wright cost us a Carter, Van Ness, Forbes, or Gonzalez. It makes a difference because there is a drop off in talent for premium positions in the 2nd round, with increasing drop offs each subsequent round.
And why would you sell talent? Because you may have different needs, like a new scheme where that person may not fit. You may wind up with a surplus for a position because you found a late round gem or 2. There's many reasons why you may sell talent. Regardless, you'll get more in trade for a premium position. Why remove that option if you don't need to.