You shouldn't need people to care about privacy because good money should default to it. Meaning that the average person gets it without having to do anything extra. Their lack of privacy and fungibility impacts everyone in that system and makes those who seek out privacy, such as coinjoining, stand out.
Privacy isn't Bitcoin's weakness. Anyone can be reasonably private by using bitcoin "properly". Fungibility is a much bigger issue. Without it, bitcoin fails at being money.
Some characteristics of the thing are the essence of the thing itself. Ex: silicon chips can only have so many imperfections in order to operate. You can advocate for chips with less imperfections or you can just realize there is a threshold beyond which they are essentially desk weights. Same thing with cryptocurrency. There is a threshold in which all this stuff sorts itself out. You can only sell me a non functional processor so many times before I learn what works and what doesn't. I really don't care the number of imperfections but indirectly I am demanding them.
