Well yes and no, and Normaly I would agree with you.
This build isn't for everyone, no doubt about it.
The whole reason I even have cloak is to avoid those point blank encouters and force a confrontation in the Short to Mid-long range where my gun wins the accuracy/power/ROF contest. Now say "Pop Pop" outloud with your average speaking voice. That is how long it takes me to kill someone with this gun. Pop Pop, 2 shots. This guns stats are
ROF: 120 ( I want to say, maybe 150)
I mean this gun is ready just as fast as most assault rifles and SMG's, and i can shoot while moving with almost zero loss of accuracy.
Flanking is just the way of life, when a guy dies there is a 1-12 sec delay until they spawn again and whatever distance required to get back to the frontline. Attackers use this time to push up and or in this case to Flank his opponents on the other side. Flanking is very common and not just for Recon's, I flank with my assault and spec just as much and as often.
Now as for the Recon build, have you ever Flanked opponents and gotten into a good position and realized that your targets are just outside of effective range? What are your options?
Run into range and expose yourself to fire from respawners comming up to support as well as the opponents your are flanking. Once you are in effective range you are trading shots rely upon your SMG to kill them before they turn and kill you, or killing one and dieing to his freinds.
Or you could try and fire from range with your SMG using short controled bursts or even semi-auto but then your time to kill takes to long and all those shots tend to give your position away and you have alerted their whole team and they counter you by getting to cover or returning fire with weapons far more suited for longer range combat.
The above build gets you the best scenario, accurate fire from range with the highest time to kill with the least amount of exposure.
I see a buddy die to an SMG I know i am getting flanked.
I see a buddy die to a Sniper Rifle, I figure he was silly and stuck his head out.
I see buddies start to drop to a Sniper Rifle who are next to me and clearly in cover...*shrug*...well in the words of a great man "Nobody expects the Spanish Inquisition"