If there's no such thing as a pitching prospect there's no such thing as a can't miss pitching prospect!
And sure, if you say he was one of the Phillies two best pitching prospects over more than a decade - between Aaron Nola and Andrew Painter - that might not be saying much. But he was still fairly well-regarded for a while, and leaguewide, not just as the best in a bad system.
Pipeline also had him ahead of both Abel and Stott in 2021. In retrospect he was already on his way to flopping, which BP was more in front off than the others. Had they traded him earlier (as they did with Sixto) they would have done better (though that was also a pretty good trade on paper, spoiled from being a good one by Crouse flopping just as badly).