This is oversimplifying things.
The fact that only one woman and one person of colour - both being Candice - has won since Season 6 is alarming. It is enough data to show that the majority of voters will default to one type of winner, often in spite of talent.
This idea that white people have "their own" cultural preferences is problematic. I think it'd be more apt to call it cultural bias.
I don't begrudge people voting for who they like, but we should be critical about WHY we like what we like. It gets tiresome to see the same people represented over and over. Some evidence like "Fantasia and Ruben!" has been presented, but I think it shows that when viewership is higher (like in the earlier seasons) and thus more diverse, talent is more likely to come out on top.
With smaller viewership, I think more talented people have been routinely passed over in favor white men. Personal preference can of course factor in (I personally had David and Trent as my winners) but it being such a trend suggests cultural bias.
I think it would be a travesty for Cade or Caleb to win this season. I like the music they do too, but I can look past that to question if they're truly the best up there. If people are voting for genre over individual talent, then we may as well have a vote in the first week of the competition and call it a day.
Based on body of work, Caleb and Michelle are the weakest left. Ada and Cade need to show they can do something else.
But my predictions for next week's eliminations are Michelle, Jurnee and Dennis, and that 2/3s of that will be heartbreaking.