Before you power level noobs

[Wevlum]

There might be a flaw in this argument... or I am missing something. Is it possible to PL my Fisher? Miner? Weaver? Any DoL/DoH job?

or is it only meant to catch up for fighters? ; ;

Well DoH and DoL aren't jobs used within parties or story/endgame content. You don't need to catch them up in the same way you need to catch up a fighter. If they were suddenly used for raids and stuff I guess there'd be a point here.