Your point is well taken but irrelevant, as FS23 is not attempting a qualitative research design. I would propose a mixed methodology for research like this to accurately inform important qualitative aspects of the study.
I would also add from a quantitative approach, that in this thread as well as the Greatest Programs of All Time, there are invariants, p-factors, purposeful sampling strategies, validity and reliability scales, etc. necessary in a study of this nature that cannot possibly be factored for two reasons: 1) the lack readily available thorough and credible extant data, and 2) the enormous time and expense of data collection and analysis. A more valid quantitative approach would require a thorough delineation of dependent, independent and invariant variables, and much more historical and experimental data beyond simply plugging in numbers into a formula which by design may have inherent selection bias.
However, in all fairness to FS23, I thoroughly understand the work that goes into a project like this and in no way would I want discourage him in his excellent hard work for all to enjoy.