Yeah. I don't see how anyone could reasonably draw the conclusion that the Cardinals are better positioned with their SP right now. The evidence just isn't there.
ERA isn't a great stat, but despite everything going wrong in their rotation the Brewers are currently 10th in the majors and the Cardinals are 23rd. I think that pretty well encapsulates things. And the upside for the Brewers with Burnes, Peralta, and eventually Woodruff is so much higher.
Brewers right now are tentative favorites followed fairly closely by the Cardinals/Cubs, and behind them the Pirates and Reds. A mediocre division for sure. Still the Brewers can't continue their May play and expect to win the division. Thankfully, due to the extent of injuries and underperformance combined with their current position, there's good reason to think that they won't.