I like Bhutan's constitutional adoption of "Gross National Happiness" as an alternative: https://en.m.wikipedia.org/wiki/Gross_National_Happiness
Thing with this is that causality is so much harder to prove so any type of evidence-based policy is reduced to stabbing around in the dark hoping that the odds of the next happiness poll are not diluted by some random corruption scandal. The whole point of having measurable metrics and models is that they allow the use of the scientific method in policy making, whilst asking random people in the street might just ge…
IMO going the easier route invariably brings along many other dangerous shortcuts.
For instance here you mention “scientific method” for GDP when the measure in itself isn’t that reliable: what fits inside GDP isn’t fixed nor objective, and a lot of decisions happens upon survey. We have countries (most countries ?) regularly reshaping how they measure GDP to fit the narrative they need.