BYU came darn close to losing at home to Oklahoma State who is having a season that is probably worse than Kentucky at this point. So sure BYU could have lost at home to Kentucky if they had played.

Whether I think it is true or not is irrelevant the point is that those in the SEC can use the same line of thinking you are using to conveniently ignore the comparable games between Boise and KSU to dismiss BYU when compared to a 2 loss ole miss team who would have a win over Georgia in this hypothetical. You are arguing with that way of thinking with one comparison while objecting to it with another.