2. The Chargers don't necessarily need a multitude of elite WRs
My second point here will tie into my third, but the Chiefs dropped a top two wide receiver in Tyreek Hill this past offseason and replaced him with JuJu Smith-Schuster and Marquez Valdes-Scantling.
Now, JuJu and MVS are not slouches by any stretch of the imagination and I'm not saying trotting out a bunch of slouches around an elite quarterback is an optimal strategy to take, but so long as you've got a guy calling the plays on offense that knows what he's doing, the necessity for "elite" weapons at the wide receiver position is not as high as it would be for lesser offensive minds.
The Chiefs replicated much of their past success with lesser wide receivers than Tyreek Hill because Andy Reid knows what he's doing on offense.
The Giants broke through this year with a rather unknown group of wide receivers thanks to the offensive mind of Brian Daboll.
The Jaguars went on a massive run towards the end of the season with Zay Jones, Christian Kirk, and Marvin Jones Jr. Again, solid guys but not elite. That was a major credit to the offensive mind of Doug Pederson.
And of course, we all know the success the Patriots had all these years with mid-range wide receivers along with a bevy of other examples from different teams over the years.
Elite receivers are nice, but teams have proven them to be more of a luxury than a necessity when the offensive mind in charge of calling the plays knows how to scheme guys open regardless of their skill level, (i.e. Andy Reid, Doug Pederson, Brian Daboll, etc.), or if an elite quarterback is in the mix, i.e. Tom Brady with the Pats or Patrick Mahomes.