To be fair, most institutions and schools for VI people only promote Jaws, which's indeed fucking expensive. As much as 900 EUR, I think. Although they did just recently add a yearly plan as well, but that seems like it'd be much more expensive in the long run.
But it's true, NVDA is completely free. It's also open source, regularly updated, has many add-ons, can be installed on a USB, etc. Now the question is, do I love it enough to go argue with a bunch of random faggots about it? I think I'd rather just watch these monkeys at the zoo watch shit at each other from a safe distance.