Continuing to use logic, however. WI, like many teams have teams that traditionally do well against them.
One of those IS NOT Minnesota. So in any season where Minnesota does beat WI, the conference will look weak.
Same thing for Iowa. MN hasn't gotten over the hump on Iowa, but Purdue beats them.
With those type of bad-beats for specific teams, I can't envision a first year where Minnesota would win the west, where people would say "Oh, wow. Minnesota won the west and the West was SO GOOD this year."
If you have Minnesota taking first, Purdue taking 2nd, and Wisconsin or Iowa third the thought is "Oh, Wisconsin had a bad year, that's why it was a down year".
Very seldom is there a chance MN, IA, and WI all go 6-0 in their non-Big Ten West games so they all finish with zero or one loss.
If you trade Ohio State to the West for any team. Purdue, Iowa, Illinois, Northwestern, etc. The talk would be "Oh wow. The West is tough. OSU, and WI, and IA, and Nebraska, etc."
But if you look at the records, they're about the same. PSU has a high rating until they lose to Iowa, then Illinois, and they almost lost to WI. But PSU is always considered really good until they aren't.