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.)
"For some people", yes nowadays, it's for wealthy people only unless it's a house in the middle of nowhere.
In a tenancy, your rent can go up but most decent countries have legal restrictions in regards to how many increases you can do in a period of time and by how much you can increase it at any given time, and gives tenants legal tools to contest it if needed. And you still get the freedom to move to a different city without losing money. Here, most people don't do anywhere near 30 year mortgages so maybe that's more of a US thing.
In an ideal world, businesses would have customers that are all equally valuable. But in the real world, many businesses have a few customers that account for most of the revenue and the rest of the customers. Those few customers become your boss and they indirectly dictate significant parts of your business because an average customer not spending as much will be ok but a major customer not spending as much will get you sweating and looking at your cashflow.
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.)