You don't get to make up the rules.
Your research is very incomplete.
You cannot hand wave professors findings because you don't like it.
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Here is more. And this is from a nice house, nothing like that would have existed in Nazareth.
Not even to my study yet.
The Bible and Interpretation - The Galilean Economy in the Time of Jesus: Can You Dig It?
One reason to ask for human pathological data is because of the Meiron excavation report. Although some of the houses were niceone elaborate one was dubbed the Patrician House11there were interesting results in the examination of the skeletal remains. First, there was a high rate of child mortality.12 Second, a pathological examination of the childrens skulls revealed that most had protein and iron deficiencies. The examiners concluded that these deficiencies were caused either by disease or socioeconomic conditions, i.e. poverty. In other words, the children may have been malnourished.13 So the presence of nice houses does not necessarily indicate how equitable the economy was and thus may not reveal the overall standard of living.
11 E. M. Meyers, J.F. Strange, and C. Meyers, Excavations at Ancient Meiron, Upper Galilee, Israel 1971-72, 1974-75, 1977 Cambridge: MASS: ASOR, 1981) 50-72.
12 See R. Hachlili and P. Smith, The Genealogy of the Goliath Family BASOR 235 (1979) 67-71, esp. 69. The children from 0-19 years of age in the Meiron tombs represented 47% of the total. This is roughly the same as the average percentage of children of that age in Greek tombs (49%) but much higher than for the tombs of Jericho (39%, a first century CE tomb) and two tombs in Jerusalem (43%, also from the first century).
13 P. Smith, E. Bornemann, and J. Zias, The Skeletal Remains in Meyers, Strange, and Meyers, Excavations at Ancient Meiron, 110-120. There were 197 individuals in this tomb. 95 of them were under age 18. 70% of the 95 persons were younger than five years.