I agree that this was and remains a problem, but I just did not see a realistic way how to fix it this off-season. There were two options maybe, trade for DK Metcalf who I am not sure I would be willing to pay and maybe trade up for Golden which would cost quite a lot (and just like with BTJ, we have no idea if there was a trade partner).
Drafting a WR in the 4th or later round was extremely unlikely to help us in this department.
If anything, fixing defense at least gives us a chance for the game with Chiefs to be different. And it seems that Beane did everything he could in this draft to try it.