But there is a big difference in your line of reasoning.
Your line of reasoning says that there is no reason to have a boat that goes 150mph. The laws in Michigan say that it's okay to have a boat that goes 150mph, you just can't go over 55 in it on any Michigan waters. You have to be outside the state controlled waterways, over 1 mile offshore, to go over 55. Same as on the roads where you can only go 55, or 70, or 75 etc. And, you have to have a license to drive on the roads period.
That's reasonable, (kind of), because of endangerment to others. (Although I've driven in Germany and enjoyed cruising down the freeway at 130).
To me it's the same with guns. You want to protect yourself at home, buy a 12 gauge that holds 8 or 9 shots, and a 9mm or something that also holds 8 or 9. If that's not enough, have extra clips. Same with a concealed carry weapon. But, a Bump-Stock combined with a 50 shot clip is not for personal protection either at home, or out and about. There is a reason fully automatic weapons are illegal for both citizens and law enforcement. If you want one, go get your FFL and have at it. Otherwise, you can't. Have the laws that were passed for the control of machine guns, the NFA in 1930 and the FOPA in 1986 (signed into law by Reagan) hurt anyone's rights to own a semi-automatic weapon since? Nope. Yet, how soon we forget, 23% of murders in Miami in 1980 were committed by machine guns. The law was put into effect in 1986. How many last year? Any? And how many people were stopped from buying a semi-automatic gun since because of those laws? ZERO
Just expand those laws a bit more to include bump-stocks and add a pistol type background check if you want to purchase a clip that holds more than ? number of bullets.
And gun-free zones are BS. They make targets out of those in them because there is less chance of the perps being stopped in a hurry so cowards use them to become famous. Again, congress should have passed a federal law requiring at least one armed brave person at every school in the nation after Columbine. Instead the idiots put up signs at every saying this school is a gun-free zone?
And last, school shootings should be a Federal crime requiring a mandatory death sentence. PERIOD!!!