As a season package holder, I do not wait until day-of to purchase tickets. As far as I understand it, something like half of MLB tickets are sold before the season starts. Yes, star-power sells tickets, but winning sells more tickets (unless you’re the Rays).
The article was a systematic development approach to get more out of marginal minor-league pitchers. Clearly no team would construct an entire pitching staff out of 3 inning pitchers, it would waste potential of some, and stretch capability of others.
on the other hand, every team has a Simeon Woods-Richardson or two in their rotation. Wouldn’t it be great if every 5th time through the rotation wasn’t effectively a bullpen game? Or if it were a bullpen game, you had a scheduled game upcoming you were confident of only using two pitchers, and not an automatic loss?