Is there a specific round count one should reach before carrying?
No, its entirely up to the individual. And you shouldnt need a license to purchase a firearm either.
However, you should, on your own, become familiar with the weapon you intend on carrying, and be able to hit the broad side of a barn with the thing.
Note:I said, on your own decide. But training helps this. Learning how to come out of a concealed rig, knowing the laws where you live, etc...
Adding to this, I first responded from iphone.
I don't think the instructors message in either class was that they shouldn't be allowed their ltc or to own firearms. They just didn't want people thinking that after a 4 hour course and 5 minutes of supervised gun handling, they were ready to go out and safely CC.
I agree that some of them were, and some weren't. I know personally, after taking my class, I went out with friends, listened to what they taught me. Took more classes, and became familiar with the firearm. By the time my license came in and I was able to purchase a firearm, I felt comfortable with them. If I wasn't, I would have gone for more training. Even still, I am taking more training.
Some people grew up with firearms, and were taught gun safety. They don't need the training.
At the end of the day, it should be up to the individual to decide if they need to take a safety class.