I will admit that I have a personal bias with this blog post because I do indeed live with my parents in order to save money. I pay my parents approximately $300 per month. I consider this to be a win-win situation as my parents get some money to help pay the bills while I get a roof over my head for very little cost. This allows me to invest more money into shares, ETFs, property, etc.
In my opinion, living with your parents helps considerably with financial success. Many people focus on small expenses when trying to live frugally e.g. they will stop buying $5 coffee each day, which will save $1300 per year. But if you don't move out of the family home, you will save about $25,000 per year (whether you rent or buy your own place).
In the Economic Explained video below on YouTube where there is a discussion about a K-shaped COVID-19 recovery, the economic benefits of living with your parents is highlighted towards the end of the video (starts at 15:20):