What benefit does a dawn raid provide over just showing up when he’s expected to be out of the house? It’s worse at protecting evidence, a harder tactical situation for the cops (entering a building where the target can ambush, easily access weaponry, and shoot from cover), and worse for the target making rational decisions (like not shooting at cops). Ignore the target, because you presumably think he got what he deserved. One of the agents got shot and they didn’t have to.
This wasn’t an imminent danger situation where if they didn’t get him at 6 am he was going to set off a dirty bomb at 7 and disappear into the wind. He was going to go to work and then come home later to do the same slow and steady crime he’d been doing for months.