Barrera has fought Ward, Shab and about to take on Beterbiev in a span of 1 year with a mediocre promoter in Main Events. On the other hand we have Lara who's backed by the most powerful man in boxing in Al Haymon yet his opposition has been worse than Cuban economy. Why come?
Haymon's clearly got the best stable at 154. Only he could tell you for sure why more matchups between the top guys haven't materialized.