That's an easy cop out answer. Yes, the solution always is to "just win". Point being the Big Ten has put itself at a competitive disadvantage relative to similarly-sized conferences who play one less conference game. The Big Ten is
guaranteed an extra 0.5 losses per team each season compared to the SEC and ACC (all three are 14-team conferences).
The SEC isn't scheduling extra Power 5 conference opponents with that extra game, they are scheduling mid-majors and FCS (can't speak to the ACC as I haven't looked at their scheduling practices like I did for the SEC).
Given the scheduling practices, it shouldn't be a shock when the Big Ten in the aggregate has 12-12.5 more losses than the SEC (0.86-0.89 more losses per team).
It's not as simple as "just win".
EDIT: The extra crossover game is a crossover, so a given team plays 3 against the other division with 9 total conference games rather than 2 with 8 total. Look at Ohio State the last two seasons...
2017:
11-2 after the CCG.
Lost vs. #5 Oklahoma (eventual playoff qualifier).
Lost at Iowa (finished 8-5) in a
crossover game.
Finished #5 in the final CFP rankings.
2018:
12-1 after the CCG
Lost at Purdue (finished 6-6) in a
crossover game.
Finished #5 in the final CFP rankings.
The Big Ten has long-term fixed crossover opponents (Ohio State's fixed crossover has been and will be Nebraska over a 5-6 year period), the other two crossovers are essentially randomly selected (or at least we can't figure out the rhyme or reason for some other than making sure teams end up with 4 home conference games one year and 5 the next).
Assuming the Big Ten would do permanent or long-term fixed crossovers with only 8 conference games, there becomes a 1/6 chance they play Iowa in 2017 (would be in place of Illinois (finished 2-10)) or Purdue in 2018 (would be in place of Minnesota (finished 6-6, like Purdue)), and 1/36 chance they play Iowa in 2017 AND Purdue in 2018. Insert an FCS opponent like the SEC plays, and that is not only a near-guaranteed win for Ohio State each year, it is also less physically taxing on starters (because they will likely be pulled early) and gives backups extended live action.
I'm not an Ohio State apologist or sympathizer, but they are great for this example.