Dude...
The higher launch angle would DECREASE range more than the 2 yards you'd be saving by snapping shorter. Also the higher trajectory and increased hangtime would decrease accuracy. This is very much a valid case of "there's a reason they do it this way".
The only time you want to adjust snap depth (which is 8 yards, not 7) is to actually LENGTHEN the snap on long FGs, so that you can drive the ball with a lower angle for more distance while still getting it over the blockers. The tradeoff for that is that gives edge rushers/blockers a shallower more direct angle to get around the edge.
*edit*
You also clearly greatly underestimate how many extra blocks there would be. The rate of blocks (or the required launch angle to get over the blockers and subsequent loss of range) is literally exponential the closer you get. It wouldn't be a 1% increase moving in 2 yards, it would be more something like double for 1 yard closer, and quadruple for 2 yards closer.