No doubt. Nebraska is an example. Their teams of late would have been just as bad in the Big 12 as they have in the B1G. And those old teams of theirs would have done well in the B1G.
I only partially agree. I think it depends on schedule. You mentioned Maryland and Rutgers but they are bad examples. Maryland had 9-10 wins a few times since 2000 in the ACC and was a more competitive program. Rutgers was regularly winning 9-10 games in the Big East. Both are not sniffing anywhere near that.
However, it really depends on schedule. Kentucky and Ole Miss a great examples. They often have softer SEC schedules versus Arkansas, Auburn or Tennessee and tend to have better seasons record-wise because of it.
I have been down on Baylor. I don't think Baylor is a very physical team after watching them yesterday. I think they would be a winner in every league but they wouldn't have competed for a conference title had they played in B1G or SEC last year. Give Baylor Tennessee's 2022 schedule and they have at least 2 losses to go 10-2 (Alabama and Georgia) and likely another loss because Alabama would beat them so bad that they would suffer injuries and have a letdown game. I think Baylor goes 9-3 or 8-4 at worse with Tennessee's 2021 schedule in that year.
Now give Baylor Kentucky's 2021 schedule and they are likely 11-1.
Maryland and Rutgers (going back to your previous example) play in one of the toughest divisions in CFB with Michigan, Ohio State, and Penn State on their schedule annually. Also add in Michigan State which is often a tough out and that is almost 4 guaranteed losses every year for these programs that did not exist in their previous league.
Power programs tend to have good players and more resources even in their down years. Most years, Florida just has better players than Tennessee. We have to recruit and be a top 15 team to stay competitive against our rivals which explains why we have been so bad with the crappy coaches we have. I do think Tennessee gains 1 extra win a year playing in Big12 or hell even playing Kentucky's SEC slate. However, put Tennessee in B1G East and we are just as bad, maybe even worse.
Who is on your schedule matters A LOT. However, their are imbalance schedules in every league.