While that doesn't make me feel better at all, that's the case with pretty much every airline, especially the ones considered to be more desirable airlines among the broader pilot applicant group at large. As a general rule, airlines who pretty much automatically take anyone who meets/exceeds their published qualifications are generally not the best places to be, and no airline is or has ever been a pure stove-piped meritocracy.

While I can't speak for the Endeavor pilots you referenced, there are great pilots turned down by pretty much every airline. Sometimes its the wonkish double jeopardy trivia questions on the written test (if there is one). Sometimes it is (was) the arguably laughable evaluation in a full motion airline sim that they never flew before. Other times its the battery of cog tests which, while we may roll our eyes at that, the powers that be swear that there is a strong correlation between those predictors and success in the firehose training programs. Other times literally 5 minutes in the "hot seat" of an otherwise "good cop" interview is enough to rattle someone enough to give those in the position of deciding if they want to hire someone for several decades while only having a very short time with them to make that decision some serious doubt.

And we simply have to move on from the concept of "good enough to fly XYZ's passengers" because that's just silly. It attaches a level of morality to it that simply doesn't resonate with the reality of it. Is that really superior to being "good enough" to fly nuclear weapons? High level politicians/military leaders/VIP's? Other airline's passengers?

I'd like to see a stronger relationship between DL and its regionals WRT pilot hiring, but I don't think a 100% guaranteed pipeline is always the way to go.