You're joking right? Go ahead and put 10k down on a 300k house and see where that gets you. It gets you $2,193 dollars a month. That's 26,316 dollars per year. Average salary in the USA is 59,428...adjusted for income tax, you're looking at a shade over 47k.
47K - 26,316= 20,684
That's 1723.00 remaining per month.
Utilities
Transportation costs
Insurance
general upkeep
savings
retirement (good luck with this one)
You can take the starbucks and doordash off the table and it still wouldn't matter, and is a gross overgeneralization. That's why pushback from boomers is disingenuous. They lived in a completely different time, and boomers who are honest with themselves will tell you this, and they actually feel bad for upcoming generations.
Imagine telling someone who has to spend half their income just to sit in an empty building, "suck it up, and stop drinking coffee"