???
https://fred.stlouisfed.org/series/MEPAINUSA672N
Note this is already inflation adjusted, so "housing, food, gas, medical care costs are all increasing" is already accounted for.
The more relevant statistic is that median real wages have only grown by about 29% across 40+ years (~0.6% per year)
Since 2000, medical care costs have risen by 121.3%, hospital services by 275%, college tuition and fees by 196%, compared to consumer goods by 86.1%. Things like TVs and electronics went way down in costs while the essentials have absolutely skyrocketed. The cheap stuff drags the average down.
You need a lot more than a single graph to argue against the quality of life going down for Americans.
Where are you getting household income from? It clearly says "Personal Income"
So the case that quality of life is trending downward is still completely valid and shows why you can't just point at a single graph and say "see? line go up therefore quality of life fine"
Labor force participation rate for both males and females has basically been flat for the past decade, so the recent discontent about "costs are all increasing while wages are stagnant or worse" is still unsupported. Moreover the 1970s was never an era of stay at home moms. Female labor force participation rate was already 45%, against around 78% for male. It also topped out at around 60% (so basically 15% increase, max) with the rate for males dropping.
Median personal income is per individual, which is obvious. After I corrected myself the question then became "did the typical individual's real income keep pace with the cost of the things they can't avoid buying?". The answer is no. And I already showed why.