Would banning larger clips for pistols really make a difference at all?

Would a ban on how large a clip you can have really change anything? Every time something happens they say ban guns that can fire X amount of bullets in X amount of time, or outlaw clips bigger than X. If you have one of these “Lone Wolves” (many whom purchased their weapons legally) would banning larger clips or certain guns really stop them? If they know they can’t have clips bigger than 10 bullets what stops them from practicing quick reloads so they can eject a spent clip, reload and cock in 5 seconds or just wait until they can have 5 to 7 pistols on them when they start the carnage so by the time they do need to reload they would have shot or scattered anyone close? Is ”lets ban larger clips” just a bunch of smoke and mirrors?