You're doing that thing again where you take "criticism of the status quo" and treat it as "inversion to a strawman opposite."
Saying, "Man, the game's release schedule is glacially slow, that sounds like it probably cost them quite a bit in sales" is not the same as saying "they should've been releasing 12 books a year every year." Rebutting the idea of WotC "releas[ing] whatever, whenever" is specious at best, because no one is asking for that.
It is possible to critique a position and ask for a moderate change, rather than wild abandon, which is what you immediately assumed here.
This, at least, is a more cogent point....but you have no data to base it on. Would it have cost them 2.33x as much to only gain 1.25x the money? Or would it have cost them 1.25x as much to make 2.33x as much money? We literally cannot know. WotC doesn't even know.