I'm not making a value judgement here, just saying:
The company would probably say in response that you are using a licensed copy of their software with their permission, and that it is still technically their software, and that they can do whatever they want with it.
(I know, I know, libre software, free software, whichever it is....😉)
And out of the kindness of their hearts, these companies promise not to monitor what you do with their software.
Unless someone waves a few dollars at them.
All true, but there's degrees of freedom. Ideally, our computers would be 100% free, but in the current world, we make compromises, both necessary, and specious. Decisions have to be made, and the decisions should always err on the side of freedom.
You run Windows because you need AutoCAD for work. There just isn't a decent libre replacement, so you're stuck for the time being. That's a reasonable reason. It would take a special kind of dedication to use an extremely limited libre package, or go back to the old T-square, and drafting table.
A free(gratis) browser isn't a good reason to give up control. Lets assume for a second Chrome is faster than Firefox. They trade off on benchmarks, but I do think Chrome is faster. Is saving a few ms on page load time worth giving up control of your machine?
Something with as much wide spread use as a web browser can also be influenced by the people that use it. If enough people demand control of their machines, and vote with their choices, you'll get control of your machine. It doesn't even take a majorty of Chrome users. A sub majority percentage is still millions of people. With something like AutoCAD, they can tell you to pound sand. Even with the large numbers of people that use it, it's still a niche application in the greater computing landscape. It's a hard sell telling everyone to go back to the T-sqaure until AutoDesk makes agreeable changes to their policy.
This isn't counting the dubious legal argument of software licensing. The whole discussion might have a different framework if our leaders weren't beholden to corporate interests.