I don't think the trade is some grand fleecing, but the framing here is more than a little silly. Bigge is a pop up relief prospect, he's a 26 y/o 12th round college draftee that no one outside the deepest of prospect nerds paid any attention to until about 10 months ago. The upside he has is no more unique than it is for hundreds of pro pitchers. Similarly, Johnson is pitching well and on an upward trend, but he's still a 15th rounder without dynamite stuff throwing 4 innings at a time in A ball. His 'upside potential' is maybe being an up and down depth starter or matchup reliever. These players have value, but they are also very fungible, any remotely competent farm system is churning out several of them every year.
And then there's Paredes v. Morel, the idea that Paredes carries 'risk' while Morel has 'upside' is mostly just code for 'Paredes has played well while Morel has not'. Paredes is 4 *months* older than Morel, and has only 1 fewer year of team control. There is the chance that Paredes doesn't continue to hit as well as he has since the start of last year(this is 1000 plate appearances, but I digress). A reasonable version of a regressed Paredes is something like a 115-120 wRC+ with average 3B defense. That's close to a best case scenario of the 'upside' version of Morel if multiple things start going right for him! Maybe he trades some defense for more offense in his version, but the value would be the same. So if Paredes and Morel are at the same point in the age curve, there's little difference in their service time value, and the 'downside' version of Paredes is as good as the 'upside' version of Morel, then why are we framing this in such guarded terms?