(emphasis mine)
This is why I
said earlier that "if you don't like FFXIV's gear treadmill, fair enough." Because that's exactly the problem you're describing. Some people stepped off the treadmill for a bit, and now, in the current state of the game, they have to spend some effort or gil to catch up.
(Why do we need to increase our ilvl? Because SE said so. It otherwise generally makes no difference to one's experience unless you're running older content unsynced.)
So, that said, why make only dungeon gear tradable? Why not also tomestone gear? Normal raid gear? Savage raid gear? You had extra dungeon gear on hand. I've had extra normal raid tokens and tomestones on hand. Where would you draw the line that says
this gear must needs be acquired through one's own blood, sweat, and tears?