People in the workforce that get handed over a laptop with Windows usually don't have any control on it due to company policies, so this is a non-argument. For the rest, I doubt 99% of people actually "need" Windows. 50%? Probably, possibly. Also, proprietary software has nothing to do with Linux or not Linux, there is proprietary software that's not Windows only.
I also don't think any of this is about privilge, it's about control. If you want control, you have to work for it. That's how everything works in life. People will always try to take away from you control. Switching to Linux may take work, but it will give you control. Learning a bit more Windows (like the operations mentionned earlier, the registery) will probably be easier and give you less. Everyone can then adjust things depending on how much control they want and time/energy they have.
I also don't think any of this is about privilge, it's about control. If you want control, you have to work for it. That's how everything works in life. People will always try to take away from you control. Switching to Linux may take work, but it will give you control. Learning a bit more Windows (like the operations mentionned earlier, the registery) will probably be easier and give you less. Everyone can then adjust things depending on how much control they want and time/energy they have.