If their reasoning says a person needs no more than 10 rounds to stop an assailant than I also think that law enforcement (with the exception of SWAT teams) should also be limited to no more than 10 rounds.
This is not being sarcastic at all.
We should ask law enforcement why they think their officers should have more than a 10 round magazine. Especially considering that only a few decades ago they were using revolvers.
This sounds like a conflicting justification. They will say the higher capacity is needed to keep up with the more advanced weaponry of criminals (so criminals arent going to be limited to ten round magazines?).