So don't live in Southern California? This is exactly the type of sacrifice people refuse to make to which I refer.
"Avocado toast" is a metaphor for conspicuous consumption at the expense of savings and investment.
Ex: $20 avocado toast at a brunch restaurant is absurdly unnecessary given the available options for sustenance.
No one actually believes avocado toast alone is what prevents younger people from getting ahead. Show me a young person making over $40k per year and I PROMISE you I can find savings opportunities in their spending habits. This, coupled with long term compounding of returns, does make a real difference over the course of a life.