Because they are a special case. All clubs new to the professional leagues are special cases: they're new.
I really don't understand the myopic thinking of some rugby league fans.
As well as their 'newness' clubs away from traditional RL towns have specific handicaps when it comes to long-term sustainability. They don't have the generations of people - potential fans - that are steeped in the game. They don't have the playing and coaching resources that heartland clubs have available to them, nor do they usually have the successful - and rich - businessmen who were brought up on the game and who might back them financially.
The game needs to be investing in the game outside of the heartlands, particularly given the failure of Super League in London, and that means diverting resources to the midlands, the south and Wales. Not to 'prop up' failing clubs but to help them build in what are sometimes hostile environments. Basically, to build rugby league communities centred around clubs such as the Scorpions, Hemel, Gloucestershire and Oxford. And, as a start, we should use the SKY TV money freed up from the likely demise of the Broncos for this exact purpose.
Anyone asking for a 'level playing field' is, in reality, asking for another 100+ years of the odds being stacked in favour of the heartlands.