Definitely where Aldo's perspective is coming from here.
Imagine he beats Frankie at FW...lets break this down. Frankie was a champion at LW, Frankie beat the best at LW, Bendo, the current LW champ, and Frankie had very close fights. People who have accomplished the following things are able to compete at the highest levels of the division. We can assume that if Aldo can beat Frankie, Aldo is able to compete at the highest level of the LW division and potentially win the belt. If Aldo finishes Frankie, which wouldn't surprise me, that will seal the deal on whether he should be allowed to challenge Bendo or have a feel out match a weight class above.