Again, the question begs to be answered with facts, not emotional rhetoric. Let's make this a little easier. Let's take it one more step and make it even easier. Since gun control advocates will not and cannot answer the question, let's provide the answer for them. The government will establish a bureaucracy to regulate licensing.
Regulations are the single largest threat to law-abiding citizens.
When government bureaucrats establish themselves as the determining factor for who gets a license and who does not, it will be abused. One only needs to look at concealed carry licenses in California. It can be said without hesitation, and this will be confirmed in court cases pending or commencing soon in California, that the administration of concealed carry licenses are filled with abuse, used as political payments, or, illegally denied to citizens as a matter of routine. The government licensing and firearms registration bureau will be staffed by government paid employees and funded by fees charged to those who license themselves and register their firearms. Some say a fee is not a tax.