You can't pick and choose your own definitions, they weren't considered professional fights back then and so they weren't.
Lomachenko was 138 vs Russell Jr. Rigondeaux's fight night weights haven't been shown much but he was 124 vs Cordoba, 128 vs Marroquin, and his team claims he was 125 vs Donaire.
It is absolutely laughable that haters call him boring. That Bob Arum calls him boring. Donaire has been in stinkers, and his opponents were connected on him. It isn't Rigs' fault that his opponents usually can't hit him. He makes his opponents look amateurish, pound for pound guy like Donaire, and solid top 10 guy like Agbeko, included. It wasn't his fault, Donaire, and Agbeko etc. can't hit him. He made the name guys he fought look just as foolish and amateurish as the lower tier guys. That is some masterful ****.