you know that as a fact how?
Is it populational v individual?
Is all development (biologically) individual.
The point abpout science investigation is "WHO PAYS"? . We are far beyond the day when ALL science was a "hobby" pursuit of Country Parsons. In those case. science was called Natural Philosophy. It wasnt till Wehlen creafted a term "Scientist" as one who pursues the natural and phywsical worls as a trade that we even began distinguishing the search for unifying theories and their component laws.
Today, science is way bwyond an ability for a country parson to pursue on his own. Most applied research is funded via industry and pharma, while most theoretical is funded by govt . Think of all the money needed for the HADRON or the SPACE Program.
Science , today , is collaborative and interdisciplanary. There are some caches pof "multidisciplanary pursuits but even those wind up coalescing with oldwer laws and thwories from other branches of science.
Where would biology be without chemistry be without physics?
Geology is mostly appleid physics in a theoretical pursuit.
HAving authored several NSF and SOE proposals , the interdisciplanary connections are almost demanded for first "cuts"
Not to appear smug but try walking in another's shoes and to see how science is just another way to earn a living