The root cause of the problem is that parents and children need to raise funds for cancer treatment in the first place.
The fact that families have to crowdfund lifesaving care creates the vulnerability but it doesn't force anyone to build an industrialized scam on top of it
Involuntary, progressive crowdfunding through government threat of violence (taxes) seems to work better than the other methods and most consider it humane. Americans have shown little interest historically in doing the humane thing, unfortunately.