You don't even need to be that agile, Rhat. People seem to keep forgetting that we have an advancement now beyond skill level 6 - and you start talking about a street sam, you're probably also talking muscle enhancers - which might very well mean a street sam with an agility above six, and inevitably, someone is going to build an elven gunfighter of some sort who has exceptional attribute agility (8 natural agility maximum) and is coming out the door with either cyberware to give them a big bonus, or adept powers to give them a big bonus, and a top quality skill in their favorite gun. You start talking about a twelve agility and a 6 (or more, what with reflex recorders or magical combat skill boosts, which is likely) and a specialization (further increasing the dice pool for that gun...) and you're talking about a monstrous dice pool. something like 21 dice without a specialization, 23 with a specialization. And this isn't even the top person in the world (no, it isn't - stop arguing, there are another 6 dice worth of skill to be had that you can't start out with at character creation.) At this point, without the accuracy boost of a laser site or a smartlink, you can buy more hits than the gun has accuracy.
Now, admittedly, we're talking street sams, not adepts, so the maximum dice pool possible here drops by about four - a 10 agility, a 6 skill + specialization, and a reflex recorder. That means a 19 dice pool, in which case, you can buy that Enfeild's hits without the accuracy increase provided by smartlink or laser sight. And if anyone thinks no one will do this, they're mad - there is always one guy who does this sort of thing (At our table, its often me that takes it to these extremes, and I apologize for that now.) So no, I don't think that the laser sights or smartlink are useless, they are simply useful to a very specific crowd, and last I checked, street sams were combat specialists, which means that they fit the crowd.