For some people "buying a house now" actually does mean "buying a house now, with cash". My mom bought her last house with cash - she just rolled over the money from the sale of my childhood home, which they paid off in the 80s. I needed a mortgage for mine, but now that I have it I'm clinging to my 2.75% rate, it's less than I can make with basically every other investment. In Silicon Valley it's not uncommon for people to buy houses (even $4-6M ones) with cash because they're sitting on an 8-figure exit.

Even besides that, there is a dramatic difference between a typical (U.S.) mortgage that locks your payments for 30 years, and a month-to-month rental where your rent can go up next month. It's the same difference as buying a solar panel that fixes your costs for 30 years vs. paying whatever electricity rates the local utility charges this month.

(And there is also a dramatic difference between having 1 boss vs. 10 clients vs. 1000 customers vs. 3 billion users. The amount you can ignore any one of them goes up exponentially, and the risk that they will all stop paying you goes down correspondingly.)