I just think that's way too simplistic a view. SLG is massively overvalued in OPS.
Are you really saying you would want a team full of these guys because they have an .800+ OPS (derived almost exclusively from SLG):
http://whatifsports.com/HBD/Pages/Popups/PlayerProfile.aspx?pid=3038397
http://whatifsports.com/HBD/Pages/Popups/PlayerProfile.aspx?pid=2713211
You also need guys to get on base.
At the risk of bringing in a real life example, I'll point out the 2010 NY Yankees.
859 Runs Scored (1st in ML by 41 runs)
.267 BA (8th in ML)
.350 OBP (1st in ML by .009)
.436 SLG (3rd in ML)
.786 OPS (2nd in ML)
By contrast, the Red Sox has the highest OPS and SLG, but had an OBP .011 less than the Yankees, and scored 41 runs less.
Now that is a cherry-picked example, but it's pretty common year in and year out that OBP drives run production, assuming a decent SLG to go with. The point is, OPS is extremely valuable, but it should be looked at with an eye towards OBP/SLG distribution, too. Not all OPSes are created equally.