Because in the past, there was this naive idea that winning either of #1 or #2 above would get your school some attention and respect..
Then we actually do #1, finished ranked, and get rewarded with a game against a 4 loss CUSA team.
Next year team loses one game to a P5 team, again finishes ranked, and get a game against a 5 loss Marshall team.
Casual fans figured out that G5 football carries no more weight than minor league baseball.. It's something to do if you get free tickets, the weather is perfect, and there's no festivals or monster trucks in town