Except that he never said anything about losing a comp pick for spikes, just regarding Landry.
About the comp pick, the good teams that always to replace their lost free agents (like the ravens and pats) do it in part with those comp picks. By either finding the next Marcia Brady or giving them more ammo to move around in the draft - either trading to get who they want or stockpiling picks into the future - it is a part of their plan. While the comp picks can't be traded, it allows them to trade their others while still grabbing a diamond in the rough like Seantrel.
The point is, if you can manage to sign Landry AND be able to keep the extra 6th, doesn't that make the most sense? There is no competition for Landry right now. If their hand is forced by another team swooping in, sure, get the guy signed. But, many other teams are also trying to avoid losing a comp pick, thus limiting the market for any remaining free agents until after the draft.