I can understand the stance. From top to bottom, I'd agree that Bellator has the least amount of talent out of all those orgs. But at the top, the talent the UFC would fold in if they were to hypothetically buy and dissolve Bellator, I think those guys would fair well. Some of their top guys were already there and did ok (Mousasi, Bader, Rumble, Larkin), and guys like Pitbull Brothers, Asomov, Lima, McKee, Nemkov, Koreshkov, maybe even MVP, would all do well to some degree. Lovato Jr. may have as well before he retired.
I rib on the UFC, but there is no doubt that they have a great roster, and generally always do. But, they seek out competition, buy them out and bring fighters over bc they already know that there is a great deal of talent in those orgs. Not all of the fighters they fold in win titles, but a good number of them find a degree of success, and they become staples of their own brand. I can't believe it wouldn't be the same for Bellator fighters.