Which (taking the peer-review but not giving it) is what is done by most established scientists. Thoughtful reviews are much more likely to be delivered by earl

Which (taking the peer-review but not giving it) is what is done by most established scientists. Thoughtful reviews are much more likely to be delivered by early-career scientists (post-doc, mostly, since Assistant Professors are very time-constrained). Being selfish in academia is an evolutionarily stable strategy.