Probably the most provocative article in a long while...

[i have crabs]

i didnt read the article yet but skimmers are not just aimed at organic carbons thier is alot more to consider like dissolved organics, micro organisms that assimilate phosphate and other nutrients also the removal of surfactants that hinder gas exchange.
ive has tanks run quite well with and without a skimmer but im not gonna unplug any skimmers