The promoters never wanted Bute to fight Hopkins or other great boxers because they knew he had no chance against them we saw it when he finally fought a real boxer like Froch.. Bute is a no name a really bad boxer
Bute looked like a monster, even Ward ducked him, but Froch took his soul. Ward went the full distance against Miranda and had a really hard fight. Ward had a easier day against both Froch and Kessler.
To me that shows it's really about style matchups. And it's why you can never say X guy is better than Y because he beat Z. Bute was a great boxer if you can't see that just from watching his fights then idk what to say to you, but when he met Froch he met his match... And unless you are Mayweather ducking everyone in their primes, even the best of the best cannot avoid such a fight sometime in their career.