Yeah exactly. Brandon Belt (138 wRC+ this year, wRC+ 125 in his career and a 2x WS champ) isn't a high end bat that leads to success in the playoffs.
Neither is Bo (125wRC+ this year, 127 career). And definitely not Vlad (118 this year, 130 career).
But the Diamondbacks on the other hand, DEFINITELY have the big bats needed. Corbin Carroll (133 wRC+, 131 career) is that guy. So is Ketel Marte (127 wRC+ this year, 113 career). Christian Walker is that guy as well (120 wRC+ this year, 111 career). Those are the star bats necessary for playoff success.