For a clear picture of the economy, it's important to have better data and quantify shit. "Common sense tells me that some millenials don't job hop!" is insufficient. You don't want legislators making retirement policy on an assumption that millenials all do or do not job hop. But at the same time you don't want them making retirement policy saying "Well, every snowflake millenial is different, so we don't really know." You want legislators having hard numbers showing that gen xers and millenials are statistically not different in terms of job duration. And then they'll continue to screw us younger generations over in favor of the greedy boomers, but that's because we don't vote, not because they lack data.
Yes, I'm aware of the hypocrisy of that last part. Point is, this is not a "Researchers say water is wet" finding, this is necessary quantification. You aren't shocked by the finding? Who cares. We still need to do the damn tests. They're not being done to validate or disprove dumb popular opinions, they're important data for knowing what the fuck is going on with the population.