If the metric is how many intruders we're shooting, then this whole discussion is moot and we can all sell our guns. Maybe the discussion is more along the lines of preparation for such an event.
A $550 PCC (before the panic) that takes mags and ammo that you already own, and may even match your EDC pistol, is a much more attractive option for a lot of people than a $700 braced AR pistol, plus a $500 suppressor, plus another $200 and a long wait for a tax stamp. Frangible pistol ammo is also available, if over-penetration is a concern.
You're going a bit over the top over my comment.
I'm simply saying, if you had to shoot a 10.5" 5.56 AR indoors to save your life, some hearing damage is the least of your worries. Unless you plan on needing to do that on a regular basis, I don't think needing a hearing aid later in life is that big of a sacrifice compared to trying to use a far less competent firearm.
Of course I'd opt for 00 buck any day of the week over any of these options, and that's pretty easy on the ears.