What makes you think they won't have a similar system? I'm no fan of this thing either - it's intrusive and won't solve a bit of problems - but it is not being foisted on us by rational actors. It's the politicians that are hell bent on keeping everybody safe and cuddly next to their TVs.
DJI is afraid that without a detailed response from somebody not in the government that there will be strict geofencing that will be bolted into the UAVs. And I'm sure that if this happens, there will be substantial penalties for trying to outfox the system and it won't stop any terrorists. It might stop a few idiots because if there are no functional drones then there can be no drone problems. I'm not sure I agree with this view although I'd give it a reasonable chance of being right, but it's reasonable.
I think the DJI system can be tweaked abit to be "OK'. Not great, but OK. Increase the pre auth times to about a week. Perhaps make permanent, personal pre auth areas. Make it more robust so that server failures won't ground the fleet. I am also worried that DJI doesn't have the best track record for pumping out high quality software and that the inevitable glitches will really mess things up, but hell, maybe they will actually get their act together and so some software QA.
And these thoughts are doubled for GoPro. They can't even get camera firmware right after how many iterations?