Trades are the most exciting aspect of sports outside of the games themselves. The prospect of seeing a player in a new environment or observing how a team values its assets keeps things fresh.
In the NFL, there is time to process normal trades. They typically happen during the offseason or early in the week if during the regular season. Fans, analysts and coaches alike can examine the move before anything comes of it. Draft-day trades do not offer the same structure.
These moves are chaotic. With just 10 minutes between each pick in the first round, there is an accelerated window to process a trade, debate its value and wonder about how a team will use its newly acquired asset(s).