cashman, incomes of 100k are not as common as you think. Per official statistics about 30% of households have incomes over that figure, let’s say 40% just for argument sake and taking into account incomes from entrepreneurs may be under-reported. Even so, most of those families are already homeowners and not creating demand for homes..a small percentage of those may be trade up buyers. However, trade up buyers are dependent on selling their existing homes to first time buyers who are typically in their late 20s/early 30s. Most in this age group do not have established careers to earn such a high income!
Secondly, a mortgage is not the only expense, most families have kids, car payments, vacations, kids college expenses, emergencies etc. that are very substantial. A family making 100k with other expenses combined is completely priced out of even the median home.