there is a gap between Kupp and the rest of the rest of the WRs in the NFL and it’s sizable
You can take JJ, Chase, and even Davante (to a certain extent) out of the game or severely limit them if you commit to stopping them and sacrifice other parts of the field.
But that’s not possible against Kupp. You can double him, triple him, bracket him, shade him….doesn’t matter. He still beats it.
In the case of Chase, as we saw last night, if you take away his go route he doesn’t have the route tree to punish you in other ways.