First, people buy the same brand they had if they were happy with it and the price is sane. That's totally reasonable in my book; and not just for cars.
Those who lease do not care about long term reliability, since they replace cars in 3 years while all major components are under warranty. So they are more likely to try new things. Again, reasonable.
I am sure there are exceptions, but I know of no one who picked a fairly expensive car (and $850 per month is a lot for a car) and started with the budget. My 2c.
This is pretty much what the person you replied to said, just in a different way.
For most people, driving comfort (we have more/less kids or aging grandparents, so need a bigger/smaller car) is a primary filter. Next is cost, where people are very aware there is not only the price but also the fuel economy and the maintenance. People know very well the parking spots in the city are limited and polluting cars are not allowed in more and more cities, so also look at small size or good enough eco scores.
There are exceptions: People getting a car from work spend whatever money they can get, and rich people optimizing for status get a BMW or maybe a Tesla.