This is how I approach it, too. I always try to think on the margins (I am an economist afterall), so the focus is on increasing the difficulty of accessing my data.

I don't believe there is an all or nothing dichotomy. If one of these big actors is dead set on getting your data, they're probably going to get it. However, most privacy breaches are just going after low hanging fruit, so even small privacy measures can have big returns.