Some of these results are probably valid but if you want to scientifically extend your life you need to do so with statistical rigor.
I don't believe you make every, or even remotely close to most of your decisions in daily life by this standard. Human brains aren't designed to and don't have the energy to do so.
However, in my job, I analyze large medical datasets. You will understand if I get a bit pedantic about such things.
Doing some strength training is a probable plus on several fronts with few risks. However if I am advising doctors or the presidential physical fitness council to recommend strength training vs endurance training vs focusing on diet on an institutional level I need to look at the evidence for each with more rigor.
