I mean, maybe? The original comment was 1-2 months, for one. Replacement level players aren't free, as we should know given the amount of heartburn everyone gets for the inevitable negative WAR guys we toss out every year.
Like, the replacement level winning percentage, per FG, is .294, which translates to a little under 48 wins. So you're basically paying to try and generate an excess 40 wins. The team control and mandated deflated salaries for younger players should, in a well run organization, give you a chunk of wins for minimal financial commitment (Busch, PCA, Brown, Amaya being extreme examples, but also guys like Steele, Hoerner, etc are playing for far less than they'd get on the open market). To use outdated numbers, you had PCA, Busch, Shaw, Amaya, and Assad preseason projected for around 10 wins while making a combined $3m. So all of a sudden you're looking for 30 wins with $230m (or so) to play with. It's...not unreasonable.
Also in this particular context, Shota is the 'ace' mostly by default. Steele put up the same fWAR production as him last year in 40 fewer innings. I've been calling for more pitching because these guys break all the time, but the team's success isn't as reliant on Shota being an elite pitcher as other teams are reliant on their aces.