Nice Post! I really do love a post with balls! It's an interesting thought. Bowman is the most underrated defender in the league. And, a Willis trade could give this team some velocity in other areas. My protest is only speculative: defense doesn't have a core singular identity, like offense does. It's more like the old Roman Republic, with two leaders, rather than one.
So, my main objection stems clearly from a cohesion view, as that the Niner's have their core leaders right now. Willis and J. Smith. Smith is a year to yearer right now, and Bowman is slated to replace Smith. D is statistically way behind this season, but don't kid yourself, we've got a top-5 D still. Can't imagine where we'd benefit from bailing on a Top-5 franchise level D, to help out in near-sighted holes that need filling.