While I can see your point, I have to say the problem of finite practice time can be overcome by innovation.
Look at zone run blocking. A singular technique that efficiently solves the problem of multiple defensive fronts.
As time has passed in modern college football, the amount of information processed by the players and coaches has exponentially increased.There is no way any coach from the 70s could ever have envisioned, let alone executed offenses as they exist today.
It is not out of the realm of possibility that in the near future, a young innovative coach will learn how to incorporate even greater multiplicity than exists in today's offenses.
It is called evolution - which happens to be very "sim".
For example, one of the more compelling arguments you make relates the sheer time required to properly practice and execute the triple option. I would agree, if you were to attempt installing the same triple option the Sooners ran in the Switzer era. What about a very limited triple option package if you have an non-starting athletic QB on your roster who could execute it? Wouldn't that be nice little twist to pull out in your most important game of the season. Now everyone else has to be ready for it too..
More importantly, there is nothing that is preventing Bob Stoops from installing a spread option package, except for his fear of injury to the starting QB. It just so happens OU has a very capable backup QB with the wheels to run the option and a good enough arm to keep defense honest. Unfortunately, Bob has grown fairly conservative and would likely not pursue something like this. It doesn't mean that it is not a good idea or could not be accomplished. And if he did do that, you have just added one more "scheme" to an offense which already gives defensive coordinators "scheme" nightmares.
The bottom line, if you added the spread option to OU's multiple offense as it exists today, and then went back in time and tried to explain it to Woody Hayes, he would laugh in your face. Yet the "reality" is, they are just a dual threat QB away from doing just that.