While I certainly agree there should be legal protections for homeowners who are unlucky enough to be on a receiving end of a misplaced no-knock "invasion", I doubt it would often play out in favor of the homeowner... that's just how things are.
I live in a town where the CCW rate is now somewhere around 25% of the adult residents. The local LE is very supportive of 2A Rights and would certainly expect a significant percentage of residents to be armed in one way or another... hopefully exercising appropriate precautions should they need to kick in a door or two (for legitimate reasons of course).
Should they find the need to pay an unannounced visit to my home it would probably not be a complete surprise as they would first encounter the photo-electric / magnetic mass sensors at the far end of the driveway, motion sensing lights and cameras covering the driveway and house entry points, pressure pads under the porch flooring, steel doors/frames and the flock of ducks that quacks up a storm when anyone enters "their" yard

I've tried to sneak up on the house without tripping any alerts and even knowing where everything is I cannot. (and no, we're not really paranoid, we just value our privacy

)