Another major consideration for spin applied to drives: is there a cross-wind? Top-spin will minimize time aloft and trajectory; back-spin will increase time aloft and raise the trajectory.
If exposed to significant (anything over 8-10mph) cross-winds, the deviation of actual ball flight from aiming arc will much greater for the shot with backspin, than for one with no spin, and even lesser deviation for topspin.
If the shot is to a wide-open fairway, no big deal ... but if you're on a course with narrow fairways and/or significant landing region side-slope, suddenly you may wish to give up some of that 'big bomber' yardage for a lot more precision and control.
Some or most of of that cross-wind impact can be nullified with off-ding shot-shaping, but that will cost yardage also.
Point is, yardage ain't everything - course management in the conditions thrown at you is what's REALLY important.