What is with the recent string of rehashed studies posted here on HN? These things are dime a dozen and almost never do anything to actually help real people li

What is with the recent string of rehashed studies posted here on HN? These things are dime a dozen and almost never do anything to actually help real people live longer or better lives. We have know for decades about the relationship between sleep and plaques. We don't need to know about yet another study conducted over an extremely short time period confirming this for the 100th time.