Oh the potential bias is still there. It simply isn't always exercised.
One of the popular fictions of the Heisman is that previous winners make up a significant percentage of the voting population, or that votes shift with a changing American population. They don't. There are something like 900 voters. Only about 60 of them are Heisman winners. Less than one-tenth. 7%, something like that. You can actually ignore them and still understand perfectly well how the Heisman vote is going.
Most of the voters are sports media types. And the ballots are divvied out regionally, 145 to each of these six areas:
Note that the Mid-Atlantic (ACC) and Northeast (ostensibly ACC, but usually aligns more B10) make natural allies of the Midwest (strongly B10) region. And those three regions have a bit of a "Rose Bowl mafia" friendship with the Far West (PAC) region. That's 4 of the 6 regions that can, from time to time, flex and ensure a B10-PAC-East Coast lad wins out.
This is precisely how Charles Woodson of Michigan won the vote over Peyton Manning about 25 years ago.
Another dimension: novelty-seeking is all the rage in Heisman voting these days. First defensive player ever. First freshman ever. First-ever two-time winner. That sort of thing.
The good news for us is, there's really nothing novel about this year's race. All the main candidates are QBs. None are freshmen. One is a previous winner, but that's been done lately, so not a factor this year. There may not be any concerted effort this year to influence the vote in a particular direction.
That still gives a B10-PAC player somewhat of an advantage over an SEC candidate (or B12 for that matter).
If Hendon is clearly the best choice, I think most media in all the regions will vote his way. But if it is close, if he and CJ Stroud are seen as very equally competitive for the award, I hate to say it, but the voting blocs used will work against our lad.
Anyway, that's just my view. Maybe a little more tinfoil hat than it needs to be. But there's definitely something to it.
Go Vols! Go Hendon!