So defense doesn't matter?
I see this with PP scoring as well, people go gaga over a player padding his stats on the PP, and ignore that what matters are "Net special teams," that is, how many goals are scored for and against on both the PP and the PK - which means that a top PK killer is worth as much as a top PP scorer.
This is similar to baseball, where traditionally BA and runs scored and RBIs were considered the measure of quality, then advanced metrics showed OPS was far more correlated to winning and that defense made a significant contribution.
Both Frost and Cates significantly improved offensively once they became 2a and 2b in December.
Both players are 24, with upside left but a lot of uncertainty due to a limited resume.
It's not either, they fill different roles and are used differently, you want Frost to get favorable matchups to aid his offensive production, you use Cates as a shutdown defensive center, a role which will suppress his offense.
Frost needs to show he can score against better competition to be considered more than a sheltered 3C in the long run.
Cates needs to show he can drive a line offensively at a respectable (3C level) to be more than a defensive specialist at center.