Reason for the LA Chargers trading Desmond King: They could bolster another area of the roster
The secondary is an area of strength for the LA Chargers as they arguably have the best secondary in the league even without Desmond King. Thus, the discussion then becomes whether or not it would be worth it for the Chargers to pick from an area of strength to help an area of weakness.
This is what the proposed Field Yates trade did. That trade included the Chargers getting veteran left tackle Riley Reiff from the Minnesota Vikings, saving the Vikings money while also giving the Chargers a tangible starter in the process.
For those unfamiliar with Reiff, I would say that he is about 80 percent as talented as Bryan Bulaga is. Reiff is league average at worst but is not a massive game-changer.
The one problem with that, in particular, is that the team really seems to believe in Trey Pipkins as the starting left tackle, hence why Jason Peters is a free agent.
The team could also look to add a defensive tackle, which would be a welcomed addition, or perhaps even another pass-catching tight end with some draft capital.
There are options there to improve an area of need by picking from an area of strength. Again, those options would have to formulate on the trade market, though.