Because Hamas are not the heroic freedom fighters that internet people have decided they must be.
They are a terrorist organization who basically gained de facto political and military control of the Palestinian people (with just a bit of help from the Israeli government…). In large part because the PLO were (allegedly) starting to get too much traction and it is a lot easier to fight against bloodthirsty savages.
So yes, they do have some boots on the ground to organize the radicalized victims of both sides and point them at Israel/the IDF. But the actual leadership are kicking back and relaxing while making big political statements about the kind of ceasefire they would accept. Just like any other politicians.