You left out this part of my post that you quoted:
If handguns are superior for clearing homes than why does every SWAT/Tactical/etc team enter a home with carbines and shotguns?
It's because it's a lot easier to hit stuff with a long gun and the power is needed when you expect trouble.
Training is the most important thing, one shouldknow how to properly clear a room with whatever weapon they have, but a shotgun really is the bestand most cost-effective choice.
In some homes the long gun will work best... in some homes the pistol will work best. For some folks who have training up the wazoo any dang gun will work the best... but then, how many average folks have training up the wazoo?
So... how many average folks have the level of training of a SWAT member?
Perhaps you do... and although I do have some training it doesn't equal the training a SWAT member gets.... and I suspect the vast majority of average folks out there don't either.
Not to mention SWAT operates as a multimember team covering each other as they work their way around corners... does the average citizen have a team to help them clear their house?
Once again... I'm not ragging on you... just pointing out that long guns are not the end all be all defensive choice for everyone in every home just because they have a bigger "bang" than a pistol.
I'll give an example... a personal example.
In my home I have a fatal tunnel and a deadly crossroads.. both at the same place, the exit from my bedroom. If I use a long gun I cannot pie all 4 corners without exposing myself from at least 2 directions because I can't get the barrel past the corner far enough to shoot at something without showing myself too much. And not without sticking the barrel of a long gun out where it can be grabbed. Not to mention it is a pain to move around without banging the barrel of a long gun against a wall or two.
With a pistol I can stay further back and still pie all those corners much more safely.
Now... perhaps some folks don't have that problem in their house but for those of us who do a long gun becomes a detriment that works against us... not for us. And I'd much rather have a lower powered pistol that I can actually use effectively than a highly powered long gun that I can't get around the corner to use.
But then... each of us needs to evaluate their own homes.. and the hazards built into those homes.. and figure out how to best address those hazards.. and what tool will work the best for addressing those hazards regardless of how big a "bang" it has.
Having the biggest gun in the world won't help if it can't be brought to bear on the threat and actually be used to defend.