That's usually because they never used or even know the existence of something better. Same thing was being said 15 years ago for IE. The average user was fine with it until they tried Chrome (or Firefox/Opera before).
I certainly know other browsers exist and I have even used them. I still don't care I just use what comes installed on the machine because like I said I don't care.
Could it be an age cohort thing?
I'm not interested in evaluating or comparing the features, but I'll use them if they suit my needs.
So sure, people won’t complain — they just accept that this is life, but life could be better if apple didn’t have monopolistic behaviors.
Yes it is for many people. They do not want to risk the chance of their tool not working for some nebulous chance at a better experience. The vast majority of people are not tinkerer's at heart.
The rest of your questions can all be answered with "Yes", as long as the tool does as expected. We are literally all in the 1% of people just to begin with by even configuring software in the first place.
What version of macOS are you stuck on? It can’t even run Sierra? https://www.mozilla.org/en-US/firefox/109.0.1/system-require...
The bigger issue for me is increasing requirements. My 2012 MacBook Air went to absolute dog when upgrading to Catalina. Terrible user experience (which, I believe, is one reason why Apple sets requirements the way they do).
Is the planned obsolescence a feature too? My 12 year old Mac laptop is dead because MacOS does not allow me to upgrade past a certain version, and the cryptography primitives do not update past that so no recent browsers support the platform. My only recourse is linux. In the future this will not be possible either because normal Linux doesn't support the new hardware, unless Asahi Linux really manages to take off.
I choose iOS because the hardware is good and _some_ of the software is good. I can't stand their business practices, and they don't actually get a lot of things right. They're just doing what MSFT wanted to do with their OS & software, except that they've monopolized the hardware too and somehow that's what protects them from antitrust.