You and the people you mentioned can all continue to defend yourselves with 10 round magazines. And since it seems nobody has had to use more than 10 rounds for defense you'll be very safe.
I happen to think hi cap semi autos are too dangerous like machine guns and not necessary for defense. As you know they have been used in many mass shootings to kill innocent people. Prove to me hi cap mags are needed for defense and ill change my argument. So far I've heard examples of people who defended with far fewer than 10 rounds and one who didn't fire a shot. Nothing close to changing my mind.
I will continue to defend Myself with any size magazine I wish. If I had a tommy gun with a drum magazine, you still would not be in any more danger from Me then if I had just a single round. I happen to think that people who fear weapons are paranoid people with fears of losing the apron strings, but that doesn't mean I'm going to shoot you.
As you likely know, or you should, the largest mass killing happen at the hands of governments. Governments that first disarm the citizens, and then kill them by the millions. You could limit a rogue government to 10 rounds a clip. All that would do is just take them longer to kill as many of their citizens as they deemed, 'radical'.
One last clue for you. Nothing you will ever say will ever change My mind about My right to bear arms. Because I am right and have the truth on My side.
Gun control has killed and will kill more people than it will ever save.