You should be careful
Somebody might get hurt.
the above two lines are quite different from the sentence:
You should be careful somebody might get hurt.
the 2nd:
A well regulated Militia, being necessary to the security of a free State
the right of the people to keep and bear Arms, shall not be infringed.
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
True, if you split the sentence in two, there can be plenty of different interpretations. The thing is, it was written as one sentence which pretty much makes the 2nd about states rights to defend themselves. It says nothing about an unregulated gun market.
Yes, there are some rulings by the Supreme Court that splits the 2nd into two sentences. That can be changed. It's not necessary. All that is under discussion right now is better background checks and restrictions on some rifles.