How many bowl games truly impacted the national championship conversation between, say 1990 and 1994 (the five years before the Bowl Alliance, which begot the BCS, which begot the CFP)? Without going back to look, I'd guess the average was less than two per year, and that was with a couple of split national champions in 1990 and 1991.
I really have yet to hear why two teams you don't care about playing in a bowl that you don't care about would make a bowl matchup that would have interested you 25 years ago seem less interesting. Why was the Rose Bowl more compelling 25 years ago when it matched a 10-2 team against a 9-3 team, but a similar matchup now is less appealing because a 6-6 team is playing a 7-5 team in Idaho two weeks before the Rose Bowl?
It's just a weird opinion that people float repeatedly, but never defend, and a bunch of other people just nod along in agreement without ever thinking about. There's a word for this -
Saudade. Nostalgia for something that never really existed.