It wasn't always as bad as it is now. One Glasgow club has amassed its fortune due to total domination of domestic competitions when it's rival club was LIQUIDATED. Also a near continous participation in lucrative European competitions, playing in front of large crowds. A new club masquarading as the previous *rangers* is being allowed to spend vast amounts (beyond its means - again!) and go into debt of millions in order to directly compete with it's neighbour. This is flying in the face of any notion that Financial Fair Play rules and regulations exist in Scottish football. The authorities both football and cultural deem it a necessity that the OF sectarian rivalry is maintained in Scotland - to the detriment of every other club.
However in answer to the OP.
Yes, even if only to provide more games.
It never ceases to amaze me how the non-OF premier league clubs manage to keep their players match fit.
Look at the number of blank week-ends (just this season) due to international breaks, winter break, early exits in cups, league opponents tied up in cup matches, rearranged fixtures, so on and so forth.
I now attend matches at Sincil Bank (Lincoln City) rather than try and work out exactly when it would be worth travelling to Perth in the hope of there being a game on at the weekend.
Most weeks first division clubs down here are involved in three matches - Saturday, Tuesday, Saturday - players are nothing if not fit and they are mostly able to handle the busy schedule.
I've watched Lincoln go from being a Conference league club attracting crowds of something like 1600 to a 1st div club filling the stadium to near capacity (10,000) for most home matches.
Of course there does not exist the 'Skewed' OF factor down here which sees bus loads of fans being sucked from towns and citys to follow the only two clubs of any apparent importance to large sections of Scottish society.