This kind of argument comes up a lot, and I really don't understand it, at all. Privacy is a process, it's something you improve over time. The alternative is completely circular.
I shouldn't care about switching to Firefox, because my ISP is already getting all this data anyway, and I shouldn't care about using a VPN because Google is getting all of this data anyway...
If you want to go from no privacy to decent privacy, it is inevitable that there is going to be a period where you are only plugging some of the holes.