The only ones not affected, (as you posted), are the ones with the enzyme catalase.
That said they are few in number respectively as it relates to freshwater aquariums.
The "One-Two Punch" Whole Tank Algae Treatment
Considering the poster only dosed to 6ml/g and reported an ammonia spike shortly after I would think the enzyme is lacking from the bactors we prefer to protect in our tanks so caution dosing H2O2 has some merit I think.
I wouldn't consider all aerobic bacteria to be protected,