I'm not disputing this and it has nothing to do with what I was talking about.
Well, yes it does. If you sign a bad player to a really awful negative-value contract and manage to get out of it because another GM is even stupider, that's lucky.
You're supplying an inference -- that the team making this particular trade was lucky rather than astute -- without any argument for why it fits into one category and not the other apart from the fact that it's Benning and everything good he does must be lucky because he's dumb. You're clearly intelligent enough to understand why this is disingenuous.
You lose your claim on being 'astute' when you sign a player as bad as Gudbranson to a contract that bad.
If I pay $8000 for a worn-out 1984 Pontiac Fiero that's actually worth maybe $1000 and then it breaks down and is sitting on my lawn and it looks like I'm going to have to pay to get it scrapped, and then some guy drives by and realizes it's the exact car his parents had when he was a kid and offers me $4000 for it, I haven't been astute. I made a terrible decision and got out of it kind of OK because I got lucky and someone else was even dumber.
This didn't happen. The team gave him a 1 year deal for under 1m, which was generally agreed to be reasonable.
Well, duh. It's an analogy to illustrate a point.