Maybe, however the Div 6 comp is entry level for any one team clubs looking to get a start into subbies so if you cant handle Div 6 they are in trouble.
Some of the Div 6 First Grade teams are pretty good. Let's not forget Redfield started there and kicked all kinds of arse (Premiers 2010, 2011) as they marched through Divs 5 (Premiers 2012) and 4 (Premiers 2014).
First Grade is First Grade for the lower divisions. If you want a social grade, and you're playing there, expect to get regularly smacked. If you're resilient enough, by all means keep going.
I don't really see Halligans as a legitimate competition, more a place for the 'extras' to have a run around every 2 or 3 weeks.
Higher Division Clubs are running Halligan teams almost every week. Having seen what Waverley put out as their "Fourth" Grade against Irish's Third Grade last year in Round 4, there is no shortage of players at top Div clubs of reasonable skill, youth, and fitness.
How to get a better spread of players across the divisions is a question that pretty much has no answer besides "you can't".
Success breeds success. Young blokes can join a club where they don't have to volunteer and can go hit the piss with their mates while watching the big games at a well-appointed home ground, with ample volunteers and history to sustain it.
Subbies have brought on a resource to help clubs deal with local and state government bodies, but you're still going to lose an argument when its your Club with 2 Rugby Grades up against the local soccer club with 50+
Particularly when you're travelling over an hour for some games, and the soccer guys don't do even half that.