Again, owners pay salaries, not cap hits. Philly traded Kevin Hayes for effectively pennies because before the trade, they owed him $21.5M over the next three years. Now they only owe him $10.7M, and their team still stinks either way. Briere saved Ed Snider $10M.
When you are trying to compete, cap hits matter because you want to maximize your team within the ceiling. When you cannot compete, you want to cut salaries to the bone and just make the cap floor to reduce the owner's losses.
Now Karlsson should attract much more in a trade because how often does a generational player, albeit one in his 30s, come available? But Grier should sell Plattner on a big retention as a way to cut salary and get assets for the rebuild.