I think (perhaps) a better comparison is we don't allow people to shout fire in a crowded theater. Every right has some limitations, otherwise laws and government are irrelevant.
https://www.thefire.org/a-reminder-about-shouting-fire-in-a-...
https://www.popehat.com/2012/09/19/three-generations-of-a-ha...
If restricting magazine size had any benefit for law enforcement you might have a point, but it doesn't.
The line has been drawn, we are just arguing over where.
Several of these things can actually be purchased illegally, non-trivially, but yet they're never used for crime. You can buy grenades, grenade launchers, cannons/etc with a "permit" from the government - they're never used in crime.
And to those who've passed a few physics classes...
This is also in the Netherlands where the borders to countries involved in active war are fairly porous.