I get what Celtics2021 is saying above but to me, the question isn't whether or not this year's team is better than last year's team, but rather if the team is better than what the team would be if it is Brown + Tatum.
So I agree that:
[White, Pritchard, Tatum, random wing, and Queta] > [White, Pritchard, Brown, random wing, and Queta]
But is:
[White, Pritchard, Tatum, random wing, and Queta] > [White, Pritchard, Tatum, Brown, and Queta] ?
You can potentially trade Brown and be better for it, or even equal but with some extra draft picks to help down the road. But I don't want to see the team going backwards at this point in time. I would rather trade for say Zion and Murphy or something like that to at least have a chance at being better.
Or say:
Lillard, White, Tatum, Camara, Queta, with Sharpe/Scoot added to the bench, or something like that. I prefer that over 4 future picks and Grant.