Normally, people don't become masters overnight, so it's interesting to see GTA San Andreas mimic that in this fashion. The important distinction is that players can only dual-wield certain weapons if they have high enough skill to do so (aka at the Hitman level). The video above showcases single weapons vs. In GTA San Andreas, there are several stats that the player can improve including various driving and weapon skills.
Although the rewards in GTA San Andreas can be unrealistic at times, it's the thought that counts.