Mr. Borland, consider what it's like to shoot game afield with a matchlock rifle from the 15th century, a flintlock from the 17th century, and a centerfire rifle from the 19th century. Which one would you have to hold still the longest after you pulled the trigger in order to hit what you're shooting at?
Thinking about these issues may help you understand why lock time's important.
If not, sorry 'bout that. I'll try again with some other explanation.