Increases in asset prices spurn consumer spending in wealthier households relative to their proportion of assets owned - the top 10% of households own 62% of the assets.[2]
[1]https://apnews.com/article/inflation-economy-wealth-rates-fe...
[2]https://www.federalreserve.gov/releases/z1/dataviz/dfa/distr...
This is the thing you're disagreeing with parent on, because it's not true if you can afford to hold the assets that are inflating.
Inflation doesn't happen in a vacuum: it's inflation-in-terms-of-____.
If you happen to own a lot of ____, because you have disposable income and can afford to invest, then your net worth "inflates" too.
Simple example: how does inflation of the price of gasoline at the pump impact you, if you own a refinery and a filling station? Certainly not in the same way it does to someone who owns neither and commutes to work daily in an ICE vehicle.