Maybe the patent office will notice a bit of prior art? One can hope, right?
Or we could hope that you can't patent ideas, only implementations, and the summary is big on telling us why the ideas are similar, but scant on whether they share an implementation.
If someone invents a steam engine, it shouldn't mean someone else can't create a different steam engine that does the same thing in a different way. Similarly, just because bitcoin allows micro payments and electronic funds transfers doesn't mean no-one else can invent something that also achieves this.
I'm all for the patent office identifying prior art, but the summary is wanting when it comes to actually showing any.