So let's make race 4 peoples. Oh and 2 of them are paraplegic. Get rid of their wheelchair, they can get to the finish line by crawling.
Yeah no, if BLM/MNK/DRG/SAM/NIN can do the job by doing the straight minimum but ranged/rdm/smn needs to surpass themselves do reach that bare minimum, it's crap. Especially when a melee can die and still pull as much as a very good ranged.
EDIT: I remember about this E4S parse.
MCH BLM DRG MNK, the 3 lasts were crap, 20th, 13th, 13th.
The MCH was good, 62th with a rDPS around 12.6k. But the funny part is that the other's rDPS were within 300 rDPS of the MCH. MNK with 100 rDPS difference.
Only the MCH in the whole team had a ranking above 45th.
In short, it means that if this team had something else than MNK/DRG/BLM, they would have never cleared E4S.
If we follow your logic we can go wild with balance and jobs could even become a free pass to beat content, like this team where the composition was the pass.