Okay but by this same logic, none of us is equipped to offer any commentary whatsoever. If we don't have adequate knowledge of starting pitchers throughout the majors like Bloom does, then we also don't have adequate knowledge of the difficulty of acquiring starting pitchers like he does.
My point is not that you need to know or predict who these players are, it's that there is a tremendous scarcity or acquisition cost of the sort you are demanding we acquire. That's what's missing from your argument. The pitchers who have fit the criteria (in the past, not necessarily the future) are under long-term contract with other teams (Cole, Alcantara, Gausman, Wheeler, Nola, Castillo, Gilbert, Cease, Berrios, Musgrove, et al.) or under inexpensive team control for a contender (Burnes, Fried, Snell, Webb, Valdez, Gallen, Kirby, et al.). Both are absurdly resource-expensive to acquire.
Many, many others have been productive and durable are much worse or hurt this year (Ray, Eovaldi, Darvish, Rodón, Scherzer, Urias, Anderson, Manoah, Montas, Mahle, Giolito, Luis Garcia, Martín Peréz, McKenzie, Taillon, Ohtani, deGrom, Bieber, Buehler, Lynn, Manaea, Wainwright, McClanahan, Mahle, Montas, Springs, Cortes, Rogers, Rasmussen, etc.).
In hindsight, yes, we should have signed Gausman or Eflin—but we could also find it instructive that neither of those guys were especially good until they were 29 anyway. It genuinely seems to me that attempting to develop Whitlock, Houck, Crawford, Bello and Pivetta into one of the above names was a better, less prohibitive bet than acquiring one of the others.