Even the summary papers can be useful. On particularly active problems there can be dozens of papers per year. Sorting out wheat from chaff by highlighting notable works, and pointing out trends in published research, is again a genuine contribution, and helpful for the scientific community.
These are often very valuable, more so than yet another 1% improvement paper that never gets reproduced.
Review papers don't steal citations. These are cited from more distant literature so readers can familiarize themselves with the topic. Those wouldn't cite all the papers mentioned in the review individually.
But as a broader point, yeah, maybe something like PageRank could be used to "pass on" the citation Ina sense.
It's not an either-or.
And one should always read and accurately describe the contents of what you cite, meaning of course you wouldn't cite everything in a review paper directly. Only that which is relevant.
Suppose we count both separately, research citations and review citations, the latter for your great review papers or even if people just want to reference the lit review section of your research paper. What would happen to the incentive? I suggest that reviews would be less incentivized as people would primarily be concerned with rating researchers according to their research citations. Just like no one cares about your textbook sales, popular though it may be for introductory uses. This would imply reviews were not "honest" citations but are done to hack the metric.
Reviews also cause other devious problems, like journals hacking their own impact factors. And don't forget the Matthew principle (aka rich get richer) whereby only big-shot researchers can get invited to have their reviews published in high-impact journals, warping the network effects to their favor even more.
I think of it as a kind of predatory or scavenger behavior. They basically steal the citations from the papers they are reviewing in return for a small effort in helping us with information retrieval. We might as well just cite google and elsevier. Ideally, citations should pass through them somehow and get applied to the original sources who did the hard work.