Not sure I agree with this. The "end up elsewhere" part is the really evocative part of that statement. There wasn't a path for AJF or Leason, they were waived. Guys like Stephenson and Siegenthaler proved they belonged in the NHL ranks, and then the Capitals acquired guys that took their roster spots (Hagelin, Chara) and ended up getting them traded. It's taken years for Alexeyev and Johansen to get opportunities in the NHL, and it's unclear if they are going to have future spots. They just plugged up the opportunities for Shepard and Stevenson with the Thompson acquisition, and now GMBM is talking about using 4 different goalies next year. It took Malenstyn until he was 26 to get a serious crack at the NHL, and then they traded him. Sutter is 24 and hasn't made his NHL debut yet. Even 1st round talents like McMichael and Lapierre have been subjected to the yo-yo approach of bouncing between the NHL and AHL multiple times (McMichael spent a full season in the NHL in 2021-22 before getting demoted the next year).
To be clear, I'm not saying the Capitals are doing anything wrong (although I do think they fumbled things with both Stephenson and Siegenthaler). A lot of these guys simply aren't good enough. But the Capitals aren't a team that seems particularly friendly to prospects or young players over the past 5-10 years. Swapping from Laviolette to Carbery should help that in the near future, but it's not an organizational trend overall.