Nope, I can’t agree with you Jeff. Your statement about Self-Help generally is too broad.
The idea that only science can help me assumes that I a) fit a standard model, and b) that I am rational. I doubt anyone manages both of those. People are varied. People are irrational, and I suspect if we ever found a perfectly rational person we would see them as inhuman.
I’m going to go out on a limb and suggest that most people here are problem solvers, and who view their lives as some sort of system to be optimised. I know that most of my life, I have. The thing is, lives are complicated, individuals are unique and have different goals, and while we can learn useful things about general trends across large populations, my life (or optimisation problem) is unique. Science can point the way, but sometimes you’ve got to do a little exploration for yourself.
I’m also interested that in your post the objective of ‘Self Help’ seems to be ‘Productivity’. I studied a bit of Psychology at university, and we discussed some experiments that had shown that ‘Happy’ people were less productive than slightly anxious people. I also see that there are studies showing the reverse, too. Either way, I would sooner be happy than productive. Maybe I’m trying to reach a different goal.
I will agree that self help books are only really useful if seen as what worked for the author. However, I’d also suggest that science is only useful if viewed within the bounds of the experiment. For example, there is reasonable evidence that some of the forms of talking therapy are useful - but that they take time. Was the time factor accounted for within the experiment?
I guess the idea that 95% of content is irrelevant to you seems likely. But the thing is, for me, it might be a different 95%.
If limited to purely the question of Productivity, I might agree that science is the main useful approach - though only if we recognise that individuals are different, and we won’t all fit the same model.
(That’s not meant as a fluffy ‘everyone is special and unique’, just the observation that there is a lot of variation within the population)