The problem with crowdsourcing locally stored things like liveries is that appropriate infrastructure is needed to accommodate large amounts of… well… stuff. IF are being very cautious with their own livery selections in that they have to make sure storage is not wasted, hence with the current systems in place it simply isn’t possible to hold such a heavy amount of data in liveries alone, especially on a dinky mobile device that probably won’t hold a 2TB SSD, provided you could squeeze one in.
Creating something like this is certainly not easy; creating the new scenery editing system was mind-bendingly difficult in itself. Liveries will have no clear baseline to start from, so just imagine the steps taken to migrate the old airport editing system to the new one, with its own difficulties exacerbated to an even further extent.
For now though, feel free to express your support here: