A town the size of Darvel can't really strengthen Scottish football nor can (m)any of the Junior sides support base.
There are far too many clubs for the size of this country.
Realistically, if you imagine say Arbroath, Forfar, Brechin and Montrose all as one team. Essentially that adds 4 small fanbases into one, combines wealth after selling off 3 old stadiums and building a purpose built community hub or something along those lines, and potentially sees a greater challenge from that area.
Dunfermline, Raith, Cowdenbeath and East Fife.
Falkirk, Stenhousemuir, Alloa etc
The list goes on and on.
The fanbases (albeit Rangers and Celtic have a lot to answer for with folk bypassing their local clubs to support a team hours drives away etc) are minuscule and generally the standard is so, so low.
Scottish football should work from 2 senior divisions maximum with say 12 teams in each division. 3 up and 3 down. Bottom tier then has a relegation playoff and an auto relegation place with the Highland and Lowland league winners.
How much better does that sound that the drab crap served up just now?