The original question is good, but lets look at it very basically...
In pure grappling, having someone in side control IS much better than having them in the turtle. From the turtle there are more movement options than from the bottom of the dominant positions (mount, back, side, N/S, etc).
BJJ basically awards points for ADVANCING towards a dominant postion (ie. takedown, guard pass, sweep) or ATTAINING one of the MOST DOMINANT fighting positions (MOUNT, BACK, Knee on stomach).
So turning the turtle over would fall into the ADVANCING towards a position category. Something like a sweep or guard pass. Basically from on top of the turtle you can do three things and still be considered winning in a grappling frame of refrence: 1. Attempt a submission (no points for this) 2. Take the back (4 pts usually if you get this) 3. Break down the turtle and put him on his back, not landing in his guard. So you could say that to increase the profiency in this area we will start awarding points for a clean turnover. It would fit in OK with BJJ logic.
However, being turtled "in the street" or in NHB may have different consequences, but the fact of the matter is that in grappling, it will always be a semi safe place. I don't think turtling is even all bad for NHB, as we see people transition to their knees and move quickly from there all the time. I guess if you are concerned about misusing your BJJ in an NHB context, then train that way and you will be less likely to develop those habits.